1. Department of Forestry, Khalkhal Branch, Islamic Azad University, Khalkhal 56817-31367, , Iran
2. Department of Agricultural and Forest Sciences, University of Tuscia, Viterbo, Italy
3. Forestry Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran
4. Department of Forestry and Forest Economics, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
5. Council for Agricultural Research and Economics, Research Centre for Engineering and Agro-Food Processing, Monterotondo (RM), Italy
6. Department of Land, Environment, Agriculture and Forestry, Università degli Studi di Padova, Padova, Italy