1. Rangeland Management Department, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
2. Department of Economics and Rural Development, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
3. Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
4. Faculty of Environmental Science and Engineering, Babeș-Bolyai University, Cluj-Napoca, Romania