[1] UNIDO, Development of clusters and Networks of SMEs: The UNIDO programme a guide to export consortia, UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION, Vienna, 2003.
[2] Majidi, J., and Shadabi, B., 2002. Industry Cooperation, Industrial Cluster, Sustainable Development,Tehran: Hezaran Press. 270p.
[3] Taghavinejad, B., and Esfandiari, A., 2007. A Survey on Iran Furniture Industry. Ministry of Industry, Mine and Trade Report, 85p.
[4] Porter, M., 1991. The Competitive Advantage of Nations, the Free Press, New York, 345p.
[5] Schmitz, H., and Nadvi, K., 1999. Clustering and industrialization: introduction. World Dev 27(9):1503–1514.
[6] Feldman, M.P., and Francis, J.L., 2004. Homegrown solutions: fostering cluster formation. Economic Development Quarterly, 18(2):127–137.
[7] Solvell, O., Lindqvist, G., and Ketels, C., 2003. The cluster initiative green book. Ivory Tower AB, Stockholm.
[8] Babkin, A., Kudryavtseva, T., and Utkina, S., 2013. Formation of Industrial Clusters Using of Virtual Enterprises. Procedia Economics and Finance, 5: 68-72.
[9] SANDAG. 2001. San Diego regional employment clusters: engines of the modern economy. SANDAG Info, No. 1, 1–31.
[10] Nadvi, K., 1999. Collective efficiency and collective failure: the response of the Sialkot surgical instrument cluster to global quality pressures. World Development, 27(9):1605–1626.
[11] Henry N. & Pinch, S. 2001. Neo-marshallian nodes, institutional thickness, and Britain’s ‘motor sport valley’:thick or thin. Environment and Planning A homepage, 33:1169–1183.
[12] Akoorie, M., 2000. Organizational clusters in a resource-based industry: empirical evidence from New Zealand. In: Green MB, McNaughton RB (eds) Industrial networks and proximity. Ashgate, Burling- ton, pp 133–164.
[13] Krugman, P., 1991. Increasing Returns and Economic Geography, Journal of Political Economy, 99: 483-499.
[14] Ciccone, A., and Hall, R., 1996. Productivity and the density of economic activity, American Economic Review 86: 54-70.
[15] Glaeser, E.L., Kallal, H.D., Scheinkman, J., and Shleifer, A.. 1992. Growth in Cities, Journal of Political Economy, 100: 1126-1152.
[16] Henderson, J., Kunroco, A., and Turner, M., 1995. Industrial development in cities, Journal of Political Economy 103: 1067–1090.
[17] Mizuno, K., Mizutani, F., and Nakayama, N., 2006. Industrial diversity and metropolitan unemployment rate, Annals of Regional Science40:157–172.
[18] Penfold, R.B., 2006. Covariance risk and employment growth in Canadian cities, Growth Change, 37:60–81.
[19] LeSage, J.P., 1990. Forecasting metropolitan employment using an export-base error correction model. Journal of Regional Science, 30: 307–323.
[20] Brown, S.J., Coulson, N.E., and Engle, R.F., 1992. On the determination of regional base and regional base multi- pliers. Regional Science and Urban Economics, 22:619–635.
[21] Kraybill, D.S., and Dorfman, J.H., 1992. A dynamic intersectional model of regional economic growth. Journal of Regional Science, 33:1–17.
[22] Nishiyama, Y., 1997. Exports’ contribution to economic growth: empirical evidence for California, Massa- chusetts, and Texas, using employment data. Journal of Regional Science, 37:99–125.
[23] Hoen, A.R., and Oosterhaven, J., 2006. On the measurement of comparative advantage. The Annals of Regional Science,40:677–691.
[24] Micheal, C., Carroll, N., Bruce, and W.S., 2008. Location quotients versus spatial autocorrelation in identifying potential cluster regions. The Annals of Regional Science, 42: 449-463.
[25] Isserman, A.M., 1980. Estimating export activity in a regional economy: a theoretical and empirical analysis of alternative methods, International Regional Science Review, 5 (2): 155–184.
[26] Duranton, G., and Overman, H., 2005. Testing for localization using micro-geographic data, Review of Economic Studies, 72 (4): 1077–1106.
[27] Maurel, F., and Sedillot, B., 1999. A measure of the geographic concentration in French manufacturing industries, Regional Science and Urban Economics, 29(5): 575–604.
[28] Fujita, M., and Tabuchi, T., 1997. Regional growth in postwar Japan, Regional Science and Urban Economics, 27 (6): 643–670.
[29] Henderson, J., and Vernon, A., 2003. “Marshall’s Scale Economies.”, Journal of Urban Economics, 55: 1-28.
[30] Krugman, P., 1991a. Geography and Trade, Leuven University Press–MIT Press, Cambridge, MA.
[31] Marshall, A., 1920. Principles of Economics. London, U.K. MacMillan and Co.
[32] Krugman, P., 1991b. “Increasing Returns and Economic Geography.” Journal of Political Economy 99: 483-499.
[33] Ellison, G., and Glaeser, E., 1997. Geographic concentration in U.S. manufacturing industries: a dartboard approach, Journal of Political Economy, 105 (5):889–927.
[34] Ellison, G., and Glaeser, E., 1994. Geographic concentration in U.S. manufacturing industries: a dartboard approach. NBER Working Paper 4840.
[35] Marshall, A., 1890. Principles of Economics, Macmillan, London, 432p.
[36] Fujita, M. and Thisse, J.F., 1996. Economics of Agglomeration. CEPR Discussion Paper 1344.
[37] Miller, P., Botham, R., Martin, R., and Moore, B., 2001. Business clusters in the UK: a first assessment. Department of Trade and Industry, London, 249p.
[38] Ministry of Industry, Mine and Trade. Statistical Report. 2011. Retrieved from (http://mimt.gov.ir).
[40] Tully, J., and Berkeley, N., 2004. Visualizing the operating behavior of SMEs in sector and cluster: evidence from the West Midlands, Local Economy, 19:38–54.
[41] Sforzi, F., and Lorenzini, M., 2002. “I distretti Industriali” in L’experienza italiana dei distretti industriali, IPI – Istituto per la Promozione Industriale, Ministero delle Attività Produttive, Roma.
[42] Yang, G., and Stough, R., 2005. A preliminary analysis of functional and spatial clustering: the case of the Baltimore metropolitan region. In: Karlsson C, Johannson B, Stough R (eds) Industrial clusters and inter-firm networks. Edward Elgar, Northampton, pp 303–32.
[43] Kennedy, L., 1999. Cooperating for survival: tannery pollution and joint action in the Palar Valley (India). World Development, 27(9):1673–1691.
[44] Reid, N., and Carroll, M.C., 2006. Collaborating to compete: the case of the Northwest Ohio greenhouse cluster. In: Gattrel J, Reid, N (eds.) Enterprising worlds. Springer, Dordrecht 41–56.