Aamery, H., Mesdaghi, M., (2002). Suervey selection diet of native plants in semi steppe rangeland's North of Semnan, Iranian Journal of Range and Desert Research, 8,849-859 (In Persian).
 Arzani. H., (1994). Some aspect of estimating short term and long term rangeland carrying capacity in the western division of new thouth- wales Ph.D. thesis, University of New South Wales, Australia.
 Baghestani Meybodi, N., (2003). Investigation of short time effects of different goat grazing intensities on some vegetation characteristics and animal performance in steppe rangelands of Yazd, Ph.D. Thesis of range management, University of Tehran (In Persian).
 Baghestani Meybodi, N., and Arzani, H., (2006). An Investigation of Range Plants, Palatability and Goat Behaviour in Posht-Kooh Rangelands, Yazd Province. Iranian Journal of Natural Resources, 58(4), 909-119(In Persian).
 Baghstani N, M., Zare, M.T and Feyaz, M. (2013).Study of palpability of range plants in steppe rangelands of Yazd province (Case study: The Nodoshan site in Sadogh City), Iranian Journal of Range and Desert Research, 20(4), 809-818 (In Persian).
 Fayaz M. Yeganeh, H., Safari, H., Shirmardi, H.A., Mirakhourli, R., Habibian, S.H. and Ashouri Sanjabi, P. (2013). Investigation on the preference value of 4 species of semi- steppe rangelands of Iran, Iranian Journal of Range and Desert Reseach, 20 (4), 686-694 (In Persian).
 Ghelichnia, H. (2015). Determination of Preference value of Rangeland Species of Polour by Shal race sheep using timing method, Watershed Management Research (Pajouhesh & Sazandegi), 107, 36-47. (In Persian).
 Hasani, J., and. Fayaz, M. (2014). Investigation on preference value of range species and grazing behavior in Qorveh Rangelands of Kurdistan. Iranian Journal of Range and Desert Research, 21(2), 357-367(In Persian).
 Hosseini (Reza), S.A. and Fayaz, M. (2014). An investigation of preference value of important range plants in Saraliabad Gorgan Rangelands in different phonological stages, Iranian Journal of Range and Desert Research, 21(2), 424-434 (In Persian).
 Roath, L.R. and W. C. Krueger. (1982). Cattle grazing and behavior on a forested range, J. Range Management. 48(4), 314-321.
 Robert, k. and Machen. R. V. (2002). Intepreting grazing behavior.Texas agriculture extention service. Texas A and M university system, USA.
 Saghafi Khadem, F., Fayyaz, M. and Naseri, S. (2013). Determination of preference value and its variation during the grass season for different species in Binalood rangeland, Khorasan. Journal of Range and Desert Research, 20(2), 369-378 (In Persian).
 Sanadgol, A. and Moghadam, M., (2004). The effects of grazing systems and grazing intensities on standing crop and forage intake in Bromus tomentellus pasture, Pajouhesh & Sazandegi, 64, 30-35. (In Persian).
 Squires.V.R. (1981). Livesdtock management in arid zone. In kata press, Clayton Nth Victoria, Australia.
 Zadbar, M. Naseri, S and F, M. (2016). Studying the preference value of range species and its relationship with rainfall, J. Range Management. 23(4), 744-759. (In Persian).
 Zare, M., Fayyaz, M., Goudarzi, Gh. and Farmahini farahani, A. (2012). Preference value comparison in range species Anjedan-Arak. Iranian journal of Range and Desert Reseach, 19 (1), 178-179 (In Persian).