Akbarlou, M., Sepehri, A., Ejtehadi, H. and Mesdaghi, M. (2010). The mountain meadows in the production of various ways to exploit West Azerbaijan (Case Study: Grasslands Chalderan). Journal of Rangeland, 3(1): 17-28.
 Amirnejad, H. (2013). Natural Resourses Economics. Sari Agricultural Sciences and Natural Resources University, 372P.
 de Groot, R.S., Wilson, M.A. and Boumans, R.M.J. (2002). A typology for the classification, description and valuation of ecosystem function, goods and services. Ecological Economics, 41(3): 393- 408.
 Fattahi, A., Ghezelseflu, N., Rezvani, M. and hoseyni, K. (2014). The valuation of natural promenades in rural areas (Case study: ChehelchayStrait). Rural Development and Strategies, 1(1): 1-14.
 Ghanbari, S., Zobeiri, M., Heshmatol Vaezin, S. M and Shamekhi, T. (2010). Estimation of fruit production of Cornelian cherry (Cornus mas L.) and Hazelnut (Corylus avellana L.) in Arasbaran forests. Journal of Forest and Poplar Research, 18(4): 609-620.
 Ghoreyshi, R., Motamedi, J. and Sheidai Karkaj, E. (2013). Estimating economic value of carbon sequestration services in rangelands with replacement cost method (Case study: Khoy Dizaj Batchy rangeland). Journal of Environmental Sciences, 12 (2): 55-64.
 Heshmatol Vaezin, S.M. (2013). Economic valuation of forest (natural resources) to decide the teachings of experimental and reform proposals. Compilation Sebastiao Kngn doctor. Research publications, 318P.
 Heshmatol Vaezin, S.M., Ghanbari, S. and Tavili, A. (2010). Income of eremurus (Eremurus olgae) and forage production in the Khazangah rangelands of Makoo. Journal of Range and Watershed Management, 63(2): 183-195.
 Hosseini, S.A., Mesdaghi, M. and Pambokhchyan, C. (2013). Comparing three methods of forage estimation in summer rangelands (Case study: Sar-Ali Abad rangelands of Golestan province). Journal of Range and Desert Reseach, 20 (1): 23-37.
 Jahanbazi, H., Iranmanesh, Y. and Talebi, M. (2006). Seed production potential of pistachio forests of Chaharmahal va Bakhtiari province and its economic effects on dwellers welfare. Journal of Forest and Poplar Research, 14(2): 159-167.
 Khajavi, A.S. (2016). Mapping the distribution and estimate the amount of orchid species in grasslands Targevar area of Urmia. M.Sc. thesis, college of Natural Resources, University of Urmia.
 Molaei, M. (2009). Economic and environmental valuation of Arasbaran forests ecosystem. Ph.D. thesis, Faculty of Agricultural Economics and Development, University of Tehran, Tehran, 340p.
 Molaei, M. and Zarei, E. (2013) Non-parametric analysis of contingent valuation method to estimate the recreational value of UrmiaJanghaliPark. The second national conference on protection and environmental bottom, 15 Agu. Hamedan, Iran. Abstract
 Monjardino, M., Pannell, D.J. and Powles, S.B. (2004). The economic value of pasture phases in the integrated management of annual ryegrass and wild radish in a Western Australian farming system. Australian Journal of Experimental Agriculture, 44(3): 265-271.
 Motamedi, J., Alijanpour, A. and Banej Shafie, A. (2016). Report of comprehensive project of recognition and utilization of by-products of rangelands and forests of West Azerbaijan province, Vice Research of Urmia University,150P.
 Mousavi, S.A. (2011). Apt management of lands by designing a planning support system based on economic values of ecosystem functions (Case study: Mid-Taleghan sub-basin). PhD thesis of Tehran University, 318P.
 Mozafarian, V.A. (2011). Plant Classification (Morphology and Taxonomy). Amirkabir Press, 1011p.
 O'Connell, M., Young, J. and Kingwell, R. (2006). The economic value of saltland pastures in amixed farming system in Western Australia. Journal of Agricultural Systems, 89(2): 371-389.
 Rastgar, SH., Darijani, A., Barani, H., Ghorbani, M., Ghorbani, J. and Vahed Bordi, SH. (2013). A new approach to economic valuation of the function of forage production of rangelands (Case Study: summer rangelands of Nour-rud watershed in Mazandaran province). Journal of Range and Watershed Management, 66 (3): 347-357.
 Range management plan Sulik (2012). Department of Natural Resources and Watershed West Azerbaijan Province, 78P.
 Sameti, M., Moeeni
, SH., Mardiha
, S. and KhanizadeAmiri
, M. (2012). Estimation the ecreational value of Najvan park of Isfahan using a contingent valuation method. Journal of Applied Ecology, 1(1): 64-79.
 Thadani, R. (2001). International non-timber forest product issues. Journal of sustainable forestry, 13(3/4).
 Tofighiazar, T. (2016). Economic valuation of ecosystem functions in Targavar grasslands of Urmia region. M.Sc. thesis, college of Natural Resources, University of Urmia, 115P.
 Winkler, R. (2006). Valuation of ecosystem goods and services, Part 1: An integrated dynamic approach. Ecological Economics, 59(1): 82-93.
 Yeganeh, H., Azarnivand, H., Salehi, I., Arzani, H. and Amirnejad, H. (2015). Estimation of economic value of the gas regulation function in rangeland ecosystems of Taham watershed basin. Journal of Rangeland, 9 (2): 120-128.