Document Type : Original Research Paper

Authors

1 Ph.D in Urbanism, Department of Urban and Regional Planning, Faculty of Art and Architecture, Tarbiat Modares University, Tehran, Iran.

2 Associate Professor, Department of Urban and Regional Planning, Faculty of Art and Architecture, Tarbiat Modares University, Tehran, Iran.

Abstract

Extended Abstract
Objective and background: In recent decades, the study of spatial planning in general and “spatial structure” in particular has taken a special position in international references. The review of related theoretical texts published in recent decades shows great changes in this area. Most of the research has reviewed and scrutinized the spatial structure in the theoretical literature and international empirical research (Parr, 2013; Meijers, 2005; Davoodi, 2003; Guillain et al., 2006; Cao, 2016; Gebhardt, 2016; Goletz, 2016). In national references, new concepts and foundations have been explored in the field of spatial structure in particular and spatial planning in general. On the one hand, the diversity and variety of research conducted in this field in national references, the contradictory results obtained from some of the research, and the lack of a single finding may imply the uselessness of the conducted research and the waste of time and money. On the other hand, the results confuse some scientific societies and theorists, policymakers, planners, and decision-makers. Therefore, a meta-study approach is used to remove such conditions in research methods and their revision process. By using a meta-study, the present study aims to review the national research in the field of spatial structure to identify and examine theoretical and scientific gaps and address the strengths of research. Finally, by combining and summarizing the studies on spatial structure, the theoretical frameworks of reviewed studies are explained.
Method: The present research is a developmental-applied study in terms of objective and includes quantitative and qualitative aspects in terms of type and nature of data. According to the characteristics of the research topic, this study is descriptive-analytical research carried out using a meta-study research method.
Finding: The content analysis of the reviewed studies showed that in these studies, four approaches had been applied to analyze the spatial structure. They include hierarchical, systemic, relational-synergistic, and contextual approaches. There are also three perspectives on “spatial structure”. The origin of these perspectives is rooted in the areas addressed in the theoretical foundations of studies. In studies on topics such as “monocentric, polycentric and scattered patterns”, the perspective on “spatial structure patterns” was applied to analyze the spatial structure. In studies on topics such as “centralized, decentralized, scattered, compact, random, sprawl, fragmented and leapfrog patterns”, the perspective on “spatial structure development patterns” was applied. Those articles focusing on topics such as “linear, island, cluster, symmetrical, correlated, radial, sector, complex, porous patterns” have analyzed the spatial structure using the perspective on “form patterns of spatial structure.” Moreover, the analysis of studies showed that the confusion of topics and concepts has taken place in the field of spatial structure. In many studies, the concepts of spatial growth patterns and spatial form patterns have been used instead of spatial structure patterns, indicating a misunderstanding of key concepts in the field of spatial structure. The analysis of studies also showed that various factors and driving forces- internal factors including “backgrounds and contexts, economic, demographic, social dimensions and infrastructure” and external factors and drivers of development including “government policies and decisions- spatial planning policies, globalization - global processes and economic rivalries”- influence the formation and change of the spatial structure of cities and regions.
Conclusion: In the general review, it can be stated that the study of the spatial structure has become an important issue in Iran only in the last two decades. About 80% of these studies have been conducted in less than a decade, indicating the emergence of this concept in the spatial planning system of Iran. On the other hand, 87% of the studies have an applied-developmental nature, and only 13% have addressed basic concepts, indicating the poor scientific development of this concept in applied-developmental studies. Among the effects of this shortcoming, one can mention the low-quality and inadequacy of the theoretical foundations presented in the studies, which was observed in 42% of the reviewed studies, according to the present study results. Only 34% of the studies were evaluated well in terms of theoretical foundations. Some significant weaknesses identified in the qualitative evaluation of studies include less use of up-to-date and reliable references, the lack of proper coherence between the objectives and research questions and theoretical foundations, and improper use of theoretical concepts and foundations. There is also a particular weakness in focusing on the approaches. There is a lack of knowledge in the reviewed studies, and most of them have expressed related approaches and theories without having any theoretical knowledge. On the other hand, more than 65% of the studies have relied on a morphological approach rather than land use, functional, and combined approaches. Therefore, in future research, it is required to pay more attention to the development of theoretical and approach concepts, structures, and frameworks and analytical approaches to the spatial structure to fix existing gaps. Also, in the analysis of geographical distribution, it was found that most of the studies focused on Tehran metropolitan area and Tehran metropolis and other geographical areas have been less studied, indicating a weak balance in exploring the different geographical areas of Iran. Of the four spatial scales, 54% of studies were performed at urban and metropolitan scales, and researchers have less considered other spatial scales.

Graphical Abstract

A meta-study of research related to urban and regional spatial structures in Iran; from 2001 to 2019

Highlights

- The analysis of studies showed that the confusion of topics and concepts has taken place in the field of spatial structure.
- In many studies, the concepts of spatial growth patterns and spatial form patterns have been used instead of spatial structure patterns.
- Various factors and driving forces- internal factors including “backgrounds and contexts, economic, demographic, social dimensions and infrastructure” and external factors and drivers of development including “government policies and decisions- spatial planning policies, globalization - global processes and economic rivalries”- influence the formation and change of the spatial structure of cities and regions.

Keywords

Ahmadi,Gh., Azizi, M., & Zebardast, E. (2011). Comparative study of city sprawl in three middle range cities of Iran: Ardabil, Sanandaj and Kashan. Journal of architecture and urban planning, 3(5), 25-43.
Alijani B. Spatial Analysis in Geography Studies. Jsaeh. 2 (3), 1-14.
Arasteh, M., Dadashpoor, H. & Taghvaee, A. (2017). Explaining the Geopolitical Evolution of Ports-Hinterland Connections in Iran; A Historical Comparative Approach. International Quarterly of Geopolitics, 12 (4), 192-218.
Azimi, A. (2018). Spatial Structure and Regional Effective Flow Network Interaction in South Alborz. Town And Country Planning, 9(2), 275-301.
Azkia, m., & Imani, A. (2006).  Meta analysis of job satisfaction in educational organizations. Journal of social sciences letter, 27(1122), 1-26.
Beyranvandzadeh, M., Ghezeli, S.,  Salari Sardari, F., & Nobakht, S. (2015). Analysis of physical spatial structure of the central part of the city of Khorramabad. Journal of Urban Landscape Research, 2(3), 73-85.
Dadashpoor, H., & Afaghpoor, A. (2016). The New Epistemic and Theoretical Rationality Governing the Spatial Organization of Urban Systems. Interdisciplinary Studies in the Humanities, 8(2), 1-28.
Dadashpoor, H., & Alidadi, M. (2018). Morphological analysis of population spatial structure of Tehran. Human Geography Research Quarterly, 50 (1), 109-125.
Dadashpoor, H., & Miri Lavasani, AR. (2015). Analysis of Spatial Patterns of Sprawl in Tehran Metropolitan Region. Spatial planning, 5(1), 123-146.
Dadashpoor, H., Haghjou, M.R., & Shahabi shamiri, M. (2015). Typology of evolutionary process of polycentric urban regions in Central Mazandaran, Researches in Earth Sciences, 6(21), 51-63.
Dadashpoor, H., Jahanzad, N., & Jalili, H. (2016). Analysis and Forecasting of the Integrated Spatial Structure in Mashhad Metropolitan Region in the Period 1996- 2041. Motaleate Shahri, 5(18), 51-62.
Dadashpoor, H., Kareshki, M., & Rafieian, M. (2017). Analysis of the Effect of Transport Corridors on the Spatial Distribution of Population and Activities in Khorasan-e Razavi Province. Journal of Spatial Planning, 20(4), 61-90.
Dadashpoor, H., Mamdohi, A., & Afaghpoor, A. (2014). Analysis of Spatial Organization in Urban Network Based on Air Flows of People: Empirical Evidence for Iran. Human Geography Research Quarterly, 46(1), 125-150.
Dadashpoor, H., & Mirvakil, H. (2016). Examining the urban network of Tehran Metropolitan region using the components of nods, density and accessibility. Urban Regional Studies and Research, 8(28), 47-70.
Dadashpoor, H., & Salarian, F. (2015). Analysis the impact of land use changes on the sprawl in Sari Urbanregion of Mazandaran. Geographical Urban Planning Research, 3(2), 145-163.
Dadashpoor, H., & Salarian, F. (2018).  Spatial patterns analysis of urban growth in Iran metropolitan regions (Case study: Tehran, Mashhad, Isfahan, and Shiraz metropolitan regions). Town And Country Planning, 10(1), 117-138.
Dadashpoor, H., & Tadayon, S. (2015a). Identification of the homogeneous flow Zones based on Spatial Motilities and Trip Patterns in Tehran Metropolitan region. Motaleate Shahri, 4(14), 61-76.
Dadashpoor, H., & Tadayon, S. (2015b). Analysis of the Role of Trip Patterns on Spatial Structure of Tehran Metropolitan Region. Geographical Planning of Space Quarterly Journal, 5(18), 65-86.
Dadashpoor, H., & Valashi, M. (2017).  Analysis of the structure and spatial organization of the city-region of Mazandaran during the period 1390-1365. Geographical Urban Planning Research, 5(2), 199-222.
Divsalar, A., & Keyannejad, Gh. (2017). The study of spatial organization of Babol County. Journal of Zonal Planing, 6(24), 129-140.
Daneshpour, Z., & Tarantash, M. (2017). Revealing land-use transformation: Analysing specifications of unplanned growth in the metropolitan region of Tehran. Honar - ha - ye - ziba Memari - va - shahrsazi, 9(71), 15-31.
Eghbal, M., Soleimani, M., Kamanroudi, A., & Zangane, A. (2018). Explaining the urban spatial structure and the formation of sub-centers in the city of Ardabil. Urban Management, 17(50), 305-322.
Ezzat panah, B., & Khaliji, MA. (2016). Analysis The Pattern of Physical and Spatial Development by Holdern Model. Geography and Territorial Spatial Arrangement, 6(20), 1-16.
Ezzat panah, B., Qalibaf, MB., & ezzati, E. (2018). Analysis Multi Polarization Process of Spatial Structure and Urban Functions (Case Study; Sanandaj City). Human Geography Research Quarterly, 50(104), 467-489.
Faraji Malai, A. (2016). Explaining the effective mechanisms in the spatial structure of Qazvin region. Sustainable city, 2(3), 83-104.
Ghadiri, M., & Dasta, F. (2016). An Analyzing of the Physical- Spatial Growth Pattern of Tehran. Geographical Research, 31(1), 33-40.
Ghadami, M., Divsalar, A., Ranjbar, Z., & Gholamian Aghamahali, T. (2013). Strategic Assessment of City Spatial Structure in Sustainability Framework (The Case of the City of Sari). Journal of Urban Economics and Management, 1(3), 1-16.
Ghadami, M., Lotfi, S., & Khaleghnia, K. (2013). Investigating the effect of spatial policies on urban spatial structure with emphasis on building density; Case study: Tehran. Urban Planning, 2(6), 89-104.
Ghadami, M., Mohamadi, SS., & Gholamian Aghamahali, T. (2012).The effect of urban spatial structure on citizen's attitude towards using private car in commuting a case of: the city of Babolsar. Research and Urban Planning, 3(9), 77-94.
Ghadami, M., & Yousefiyan, P. (2014). Analysis of the changes in spatial structure to an aversion of the air pollution in Esfahan city.  Journal of SHAHR-HA, 2(8), 63-86.
Gharakhlou, M., & Shahraki, S. (2009). The identifying spatial growth pattern of cities with Regard to quantities models: Tehran. Geography and Environmental Planning, 20(2), 19-40.
Gholami, Y., Hayati, S., & Ghanbari, M. (2015). Identifying Physical - Spatial Growth Pattern of Metropolises of Iran (Case Study: Mashhad, Shiraz, Isfahan, and Tabriz). Urban Areas Studies, 2(3), 79-100.
Ghalibaf, MB., Ezzat Panah, B., & Pourmousavi, SM. (2010). Spatial concentration and it's effecs on the physical extension and spatial structure of Sanandaj City. Geographic Space, 10(32), 151-180.
Ghanbari, A., Karami, F., & Heydariniya, A. (2016). The Role of Foot Bridge in Social-traffic Discipline and Safety Case study: (Kerman city). Amayesh Journal, 33, 71-39.
Gharaei, A., Zebardast, E.,  & Majedi, H. (2020). Typology of urban form and sustainable spatial structure; With a view on the metropolis of Tehran. City identity, 14(41), 17-32.
Ghazi-Tabatabaian, M., & Vadadhir, A. (2010). Meta-analysis in social and behavioral research. Publication: sociologists. 
Hooman, HA. (2008). Practical guide to meta-analysis in scientific research. Tehran: Samt.
Hosseini,SH., & Ghadami, M. (2014). Analysis of Sabzevar physical-spatial development pattern. Geographic Space, 13(44), 219-240.
Hoseyni, A., & Bahrami, Y. (2013). The effect of urban spatial structure on travel behavior of citizens case study: Rasht city. Journal of Applied Researches in Geographical Sciences, 13(28), 243-267.
Hoseyni, A., Poor Ahmad, A., & Zirai, K. (2019). Analysis of urban spatial structure based on the spatial distribution of population in Tehran, A polycentric city morphological approach. Geographical Planning of Space Quarterly Journal, 8(30), 19-38.
Hoseyni, A., & Poor Ahmad, A. (2020). Analysis of urban spatial structure with emphasis on employment and activities distribution in Tehran. Geographical Urban Planning Research, 7(4), 677-699.
Jamali, F., Hosseinzadeh, K., & Hatami Alamdari, I. (2013). Change of economic structures and new foundations of urban and regional spatial planning, case study: Tabriz Metropolis. Geography and Territorial Spatial Arrangement, 2(5), 1-19.
Kaviani, A., Farhudi, R., & Rajabi, A. (2016). Analysis Of Growth Pattern In Tehran With Landscape Ecology Approach. Geographical Urban Planning Research, 3(4), 407-429.
Kheyroddin, R., & Khazaeian, O. (2015). New telecommunications technologies impacts on spatial structure and metropolitan areas integration (The case of Tokyo, Osaka and Nagoya metropolitan areas in Japan). Naqshejahan- Basic studies and New Technologies of Architecture and Planning, 15(2), 5-18.
Kheyroddin, R., & Piroozi R. (2014). A New Typology of Spatial Spread Genesis in Metropolitan Areas (Case Study: Metastatic Growth in Eastern Corridor of Tehran Metropolitan Area). Urban Management, 35(13), 229-254.
Kheyroddin R., & Salarian F. (2015). Analysis of urban spatial transformations by using Cellular Automation (CA); for direction spatial development of Chalous city. Researches in Geographical Sciences. 15 (39),153-176.
Kiani, A., Sardari, F., Beyranvandzadeh, M., & Bostani, A. (2012). An Analysis of spatial structure and Sprawl development in Sistan cities. Research and Urban Planning, 3(8), 77-92.
Lotfi, S., Divsalar, A., & Sarfi, A. (2014). Journal of Geographical Exploration of Desert Areas, 1(2), 77-101.
Lotfi, S.,  Shahbi Shahmiri, M., & Salehi Amini, H. (2015). Explaining the concept of urban polycentric region from analytical and normative view (A Review Study). Journal of SHAHR-HA, 3(10), 79-102.
Lotfi, S., Nabi Nejad, M., & Fatemi, MM. (2012). Investigating the efficiency of urban spatial structure and distribution of service use in linear cities of northern Iran.Motaeleate Shari, 1(2), 7-21.
Lotfi, S., Shahabi Shahmiri, M., & ; Roushenas, S. (2017). A comparative investigation of spatial structure and benefits of urbanization (a case study Shiraz and Central Mazandaran). Journal of Geography and Planning , 21(60), 197-220.
Malekzadeh, N., Dadashpoor, H., & Rafieian, M. (2020). Investigating the Factors Influential on the Urban and Regional Spatial Structure Using the Content Analysis Method. Urban Planning Knowledge, 3(4), 1-14.
Mavedat, E., Maleki, S., & Momeni, K. (2018). Assessment and Evaluation the Spatial Structure and Urban Creep (Case Study: Yazd City). Journal of Urban Social Geography, 4(2), 151-175.
Manouchehri, A., Anvari, A., & Ahar, H. (2020). Analysis of the role of functional nuclei in creating imbalance in spatial structure (Case study: Tehran metropolis). Geography and Territorial Spatial Arrangement, 9(3), 23-40.
Mirkatooli, J., ghadami, M., Mahdian, M., & Mohamadi, S. (2011). Study and survey of trend and physical- space expansion of Babolsar city with using Shannon’s Entropy and Holdern models. Journal of Studies of Human Settlements Plannig, 6(16), 115-133.
Mobaraki, O., Mohammadi, J., & Zarrabi, Z. (2013). Presentating the Optimum Pattern for Physical- Spatial Development of Urmia City. Geography and Development Iranian Journal, 11(32), 75-88.
Mocheshi, RS., Zyari, K., Hataminejad, H., & Farhodi, R. (2017). Analysis of Spatial-Physical Locate of the Knowledge base In contrast to Traditional Functions in The City of Tehran. Human Geography Research Quarterly, 49(99), 1-18.
Mohammadpoor, A. (2011). Beyond the philosophical and practical foundations of the combined research method in the social sciences and behavioral sciences. Publication: Sociologists.
Moshfeghi, V., Jafari, Y., & Alizadeh, H. (2019). Analyzing the Urban Network Morphology through Balancing of Space Approach: A Case Study of the Urban Network of Hormozgan Province. Town & Country Planning (2008-7047).  11(2), 311-336.
Movahed, A., Sahraeyan, Z., & Soleimani, M. (2019). Analysis of the relationship between the spatial structure and neighborhood urban Sprawl by Using Space Syntax (Case Study: Shiraz City. Journal of Geography and planning, 23(68), 265-284.
Nikpour, A., Lotfi, S., & Rezazadeh, M. (2017). Analysis of the relationship between urban form and access indicator (Case study: Babolsar city). Journal of Spatial Planning, 7(3), 85-106.
Omraani, M., Masoumi, M., & Nazmfar, H. (2019). The temporal- spatial measurement of Urmia city s space form with emphasis on urban Density indices. Geographical Urban Planning Research, 7(3), 629-653.
Piri, S., & Saremi, H. (2019). Analysis The Population Spatial Structure of Tabriz Metropolitan Region (TMR). Urban Management, 17(53), 77-92.
Rahnama, M., Abdoalahzadeh, M., & Sadegzade, M. (2016). A comparative study of physical-spatial growth pattern of Tabriz and Istanbul metropolis. Journal of Urban Ecology Research, 7(13), 51-66.
Rajabi, A., & Moradi Mokarram, S. (2018). Factors Influencing the Change in Physical and Spatial Structure of Asadabad City. Journals of Urban Development studies, 2(5), 63-78.
Razaghi, H., Zayyari, N., & Saeedi, R. (2012). The Polycentric and Multi-core Model of City and Metropolis: from Theory to Practice (A case of Karaj). Geographical Research, 26(3), 73-100.
Rezaee, P., & Zebardaset, E. (2017). Assessing the modality of poly-centric development (A case study of Rasht City-Region). Journal of SHAHR-HA, 4(15), 31-53.
Saidi, A. (2011). Structural-functional Dynamism A Systematic Approach in Spatial Studies. Geography, 9(29), 8-16. 
Saidi, A. (2012a). Fundamental Terms and Conceptions in Physical-Spatial Planning (part ll). Journal of Physical Development Planning, 1(1), 9-26.
Saidi, A. (2013). Fundamental Terms and Conceptions in Physical-Spatial Planning (part ll). Journal of Physical Development Planning, 1(3), 11-24.
Saidi, A. (2012b). Fundamental Structural-functional scanning: an alternative approach to spatial planning.   Journal of Space Economics and Rural Development, 1(1), 1-18.
Safiri, K., & Modiri, F. (2011). A Meta-analysis of studies on factors affecting leisure time. Sociological Review, 18(38), 145-166.
Sadeghi, A., Moshabbaki Esfahani, A., Kord Naij, A., & Khodadad Hossein, SH. (2016). Meta-Method of Islamic Management in Iran (Case of study: Scientific-Research Articles 1380-1394). Islamic Management Journal, 23(4), 101-123.
Shamsi, L., & Ziari, K. (2017). Investigating and Analyzing the Potential of Multi-Centered Development in Trans-Regional Scale: A Case Study of Mazandaran Province. Journal Of Geography and Regional Development Reseach Journal, 15(1), 151-169.
Sheykhi, H, Zaker haghighi, K., & Mansoori, S. (2014). An Investigation into the Scattered Urban Development of the City of Boroujerd and Suggestions for Inner-City Development. Research and urban planning, 4(15), 37-56.
Sohrabi Yurtchi, B., Aazami, A., & Yazdani, HR. (2011). The Pathology of the Research of Islamic Management based on Meta-Analysis. journal of Public Administration Perspective, 2(6), 9-24.
Soleimani, M., Nazariyan, A., & Hasan Yazdani, M. (2011). Iran, s Network Cities with Emphasis on Spatial Interpretation of Mony Orders. Journal Urban - Regional Studies and Research, 2(7), 1-30.
Soleimani, M., Kamranoodi, M., Ahmadi, M., Zanganeh, A., &   Abya, H. (2019). Preparation principle for Mohallah Playground Design, With Emphasis on Revival of Irainian Native Games; Case Study: Mohallah of Bagh-feyz in Tehran. Journal of Studies On Iranian - Islamic City, 9(36), 5-22.
Torkamani, ZA., Yazdani, M., & Ghanbari, A. (2019). Analyzing the spatial structure of the city with an emphasis on spatial connectivity and connectivity Metropolis of Tabriz. Research and Urban Planning, 10(37), 25-40.
Zangi Abadi, A., Nastaran, M., & Kamali Baghrahi, E. (2016). Trend Analysis and State of Physical - Structural Development of Kerman City (Emergence Up to Now).  Urban Areas Studies, 2(5), 23-42.
Zebardast, E., & Shahabi Shahmiri, M. (2013a). Measuring Polycentricity of conurbation in Iran; Case Study of Amol-Babol-Ghaemshahr-Sari in Mazandaran. Motaleate Shahri, 2(8), 47-58.
Zebardast, E., & Shahabi Shahmiri, M. (2013b).Presenting a research framework for polycentric metropolitan area to empirical and theoretical development of this concept in Iran. Journal of SHAHR-HA, 1(3), 143-160.
Zebardast, E., & Shad Zaviyeh, H. (2012). Identification of Factors Influencing Urban Sprawl and Its Relationship with Urban Spatial Structure (Case Study: Urmia City). Journal of Architecture and Urban Planning, 4(2), 89-102.
Zebardast, E., & Hajipour, Kh. (2009). Explanation of Formation, Evolution and Transformation Process of Metropolitan Regions. Human Geography Research Quarterly, 41(69), 105-121.
Ziari, K., Asadi,S., Rabbani, T., & Molaei Qelichi, M. (2014). Assessment of Spatial Structure and Providing Urban Development Strategies for New Town of Pardis. Human Geography Research Quarterly, 45(86), 1-28.
Anas, A., A, R, Small, K.A (1998), Urban spatial structure. Economic Literature, 63(3), pp. 1426-1464.
Bench, S, Day, T (2010), The user experience of critical care discharges: a
meta-synthesis of qualitative research. International journal of nursing studies,
47(4), pp. 487-499.
Batten, D. F (1995), Network Cities: Creative urban agglomerations for the 21st Century.
Urban Studies, 32(2), pp. 313-327.
Boarnet, M.G, Hong, A, Santiago-Bartolomei, R, (2017), Urban spatial structure, employment subcenters, and freight travel. Journal of Transport Geography, 60,  pp.  267-276.
Burger, M, Meijers, E.J, (2012), Form follows function? Linking morphological and functional polycentricity. Urban studies, 49(5), pp.1127-1149.
Berry, B (1964), Cities as systems: Within systems of cities. University of Chicago.
Green, N (2007), Functional polycentricity: A Formal definition in terms of social network analysis. Urban Studies, 44(11), pp.2077-2103.
Christaller, W, (1966). Central Places in Southern
Germany Englewood Cliffs, NJ: Prentice-Hall. Evidence from Australian Cities*. Economic Record, 88 (282), pp.303- 322.
Champion, A. G (2001), A changing demographic regime and evolving polycentric urban regions: consequences for the size, composition and distribution of city populations. Urban Studies, 38 (4), pp. 657–677.
Castells, M (1996), The rise of the network society. Malden: Blackwell.
Cao, G., Shi, Q, and Liu, T (2016). An integrated model of urban spatial structure: Insights from the distribution of floor area ratio in a Chinese city. Applied Geography, 75, PP. 116-126.
Davoudi, S (2003). Polycentricity in European spatial planning: from an analytical tool to a normative agenda. European Planning Studies, 11, pp. 979- 999.
Dadashpoor, H, Afaghpoor, A, Allan, A (2017), A methodology to assess the spatial configuration of urban systems in Iran from an interaction perspective. GeoJournal, 82, pp.109-129.
Dadashpoor, H,   Alidadi, M (2017). Towards decentralization: Spatial changes of employment and population in Tehran metropolitan region, Iran. Applied Geography, 85, pp. 51–61.
Alidadi, M, Dadashpoor, H (2017). Beyond monocentricity: examining the spatial distribution of employment in Tehran metropolitan region, Iran. International Journal of Urban Sciences, 22(1), pp. 38-58.
Dadashpoor, H,   Ahani, S (2019). A conceptual typology of the spatial territories of the peripheral areas of metropolises. Habitat International, 90, pp. 102015.
Dadashpoor, H, Azizi, P, Moghadasi, M (2019). Analyzing spatial patterns, driving forces and predicting future growth scenarios for supporting sustainable urban growth: Evidence from Tabriz metropolitan area, Iran. Sustainable cities and society, 47, 1-45.
Dadashpoor, H, Saeidi Shirvan, S (2019). Measuring functional polycentricity developments using the flow of goods in Iran: a novel method at a regional scale. International Journal of Urban Sciences 23(4), 551-567.
Hall, P. G, Pain, K (2006), The polycentric metropolis: learning from mega-city regions in Europe. London: Earth scan.
Edwards, M, Davies, M, Edwards, A (2009), What are the external influences on information exchange and shared decision-making in healthcare consultations: a meta-synthesis of the literature. Patient education and counseling, 75(1), pp.37–52.
Garcia-Lopez, M.A., Muniz, I (2010), Employment decentralization: polycentricity or scatteration? The case of Barcelona. The urban study, 47(14), pp.3035–3056.
Gebhardt, L, Krajzewicz, D, Oostendorp, R,  Goletz, M, Greger, K, Klötzke, M, Wagner, P, Heinrichs, D (2016), Intermodal urban mobility: users, uses, and use cases. 6th Transport Research Arena April 18-21, Transportation Research Procedia, 14, pp.1183 – 1192.
Guillain, R, Le Gallo, J, Boiteux-Orain, C (2006), Changes in spatial and sectoral patterns of employment in Ile-de-France, 1978-97. Urban Studies, 43(11), pp.2075–2098.
Goletz, M, Feige, I , Heinrichs, D (2016), What drives mobility trends: results from case studies in Paris, Santiago de Chile, Singapore and Vienna. European Transport Conference 2015 – from Sept-28 to Sept-30, 2015. Transportation Research Procedia 13, pp.49 – 60.
Ewing, R. H (2008), Characteristics, causes, and effects of sprawl: A literature review Urban Ecology ,pp. 519-535,Springer.
Jacobs, J (1969), The economy of cities. New York: Vintage.
Kulish, M, Richards, A, Gillitzer, C (2012), Urban Structure and Housing Prices: Some Evidence from Australian Cities. Economic Record , 88 (282),pp.303- 322.
Lei, Q, Bin, L (2008),  Urban sprawl :A case study of Shenzhen, China. Paper presented at the 44th ISOCARP Congress.
Meijers, E.J (2005). Polycentric urban regions and the quest for synergy: is a network of cities more than the sum of the parts?, Urban Studies, 42(4), pp.765–781.
Neal, Z. P (2010), Refining the air trafc approach: An analysis of the US city network.
Urban Studies, 47 (10), pp.2195-2215.
Pred, A. R (1973), Urban growth and the circulation of information: The United States
system of cities, pp.1790–1840. Cambridge: Harvard University Press.
Raman, SH, I Dempsey, N, (2012). Cultural diversity and spatial structure in the Indian urban context. Journal of Urban Design, 17(3), pp.425–447.
Parr, J (2014), The regional economy, spatial structure and regional urban systems. Regional Studies, 48(12), pp.1926-1938.
Parr, J (2005), Perspectives on the city‐region. Regional Studies, 39(5), pp. 555-566.
Vasanen, A (2012), Functional polycentricity: examining metropolitan spatial structure through the connectivity of urban sub-centres. Urban studies, 49(16). P.3627–3644.
Vance, J. E, Jr (1970), The Merchant’s World. Englewood Cliffs, NJ: Prentice Hall.
Wilson, E., Hurd, J. D, Civco ,D. L, Prisloe, M. P, Arnold, C (2003), Development of a geospatial model to quantify, describe and map urban growth. Remote Sensing of Environment, 86(3), pp.275-285.