Rostami, T., 2003. Qualitative and quantitative assessment of reforestation carried out by forestry cooperatives in the province of Gilan, Gilan Applied Research, Management and Planning Organization of Gilan. 132 p. (In Persian).
 Bakhshi, R., Ramezanpour, H. and Lshkarbolouki, A., 2012. The effect of reforestation of pine and poplar forest on some soil properties in the region Fidreh of Lahijan. Journal of Iran Forestry, Society of Iran Forestry, 2(2): 321-332. (In Persian).
 Moradikia, S., 2007. Industry and spruce. Wood and Paper magazine, 35(5): 31-35. (In Persian).
 Jalili, A. and Ghasemi, F., 2007. Strategy for sustainable supply of lignocellulosic materials. Publisher of Research Institute of Forests and Rangelands, 312p. (In Persian).
 Vatani, L. and Davanlou, M., 2008. Problems and barriers to wood farming, the second Congress of poplar and potentials of poplar planting. Research Institute of Forests and Rangelands, 2(2): 345-358. (In Persian).
 Aminpour, T., 2008. Opportunities and Challenges of poplar farming, the second Congress of poplar and potentials of poplar planting. Research Institute of Forests and Rangelands, 4(2):381-386. (In Persian).
 Porter, E. and Miller, E., 1985. How Information Gives You Competitive Advantage. Harvard Business Review, 189 p.
 Jaap, G. and Hans A., 2003. Value Based Requirements Engineering: Exploring Innovative e-Commerce Ideas, February 4, Vrije Universiteit amit, christoph zott, value creation in e-business. trategic management journal, 22(5): 493–520.
 Kaplinsky, R. (2000) Spreading the Gains from Globalisation: What Can Be Learned from Value Chain Analysis. Journal of Development Studies, 37(2): 117-146.
 Penfold, R. B., 2006. Covariance risk and employment growth in Canadian cities, Growth Change, 37(2): 60–81.
 Hoen, A. and Osterhaven, J., 2006. On the measurement of comparative advantage. Ann Reg Sci, 40(3): 677–691.
 Duranton, G. and Overman, H., 2005. Testing for localization using micro-geographic data, Review of Economic Studies, 72 (4): 1077–1106.
 Heshmatol Vaezin, M., Peyron J-L. and Lecocq, F., 2009. A simple generalization of the Faustmann formula to tree level. Canadian Journal of Forest Research, 39(3): 699-711.
 Niquidet, K. and Van Kooten, G.C., 2006. Transaction Evidence Appraisal: Competition in British Columbia’s Stumpage Markets. Forest Science, 52(4): 451-459.
 Kitikidou, K., Kaymakis, M. and Milios, E., 2012. Site index curves for young Populus tremula stands on Athos Peninsula (northern Greece), 10(2): 1006-1075.
 Henderson, J. Kunroco, A. and Turner, M., 1995. Industrial development in cities. Journal of Political Economy, 103(4): 1067–1090.
 Nishiyama, Y., 1997. Exports’ contribution to economic growth: empirical evidence for California, Massa- chusetts, and Texas, using employment data. Journal of Regional Science, 37(3): 99–125.
 Hoen, A.R. and Oosterhaven, J., 2006. On the measurement of comparative advantage. The Annals of Regional Science, 40(1): 677–691.
 Isserman, A.M., 1980. Estimating export activity in a regional economy: a theoretical and empirical analysis of alternative methods. International Regional Science Review, 12(2): 155–184.
 Maurel, F. and Sedillot, B., 1999. A measure of the geographic concentration in French manufacturing industries. Regional Science and Urban Economics, 5(4): 575–604.
 Fujita, M. and Tabuchi, T., 1997. Regional growth in postwar Japan. Regional Science and Urban Economics, 27(1): 643–670.
 Krugman, P., 1991. Increasing Returns and Economic Geography, Journal of Political Economy, 99(2): 483-499.
 Glaeser, E.L., Kallal, H.D., Scheinkman, J. and Shleifer, A., 1992. Growth in Cities. Journal of Political Economy, 100(3): 1126-1152.
 Miller, M., Gibson, L.J. and Wright, N.G., 1991. Location quotient: a basic tool for economic development studies. Economic Development Review, 9(2): 55 – 68.
 Hosseinzadeh, O., Azizi, M., Hamzeh, Y. and Faezipour, M., 2013. The geographic concentration of the furniture industry's assessment aimed to develop clusters of furniture. Journal of Iranian Wood and Paper Industries, 4(2): 33-44.
 Mansouri, I. and Mohamadlou, H., 2009. Cluster Development Projects (Plans and Outcomes). 1nd ed., Iran Small Industries and Industrial Parks Organization Press, Tehran, Iran, 135 p.
 Barzegar, A., Nemati, A. and Zakeri, E., 2014. Identification of socio-economic factors affecting the plantation in North Khorasan province. Journal of Forest and Poplar Research, 58(4):711-723.