Author(s):
1. Biljana Šljukić, Univesity of Belgrade Faculty of Forestry, Serbia
2. Milan Medarević, Univesity of Belgrade Faculty of Forestry, Serbia
3. Dragan Borota, Šumarski fakultet Beograd, Serbia
4. Nevena Vasiljević, Šumarski fakultet Beograd, Serbia
5. Snežana Obradović, Univesity of Belgrade Faculty of Forestry, Serbia
6. Nenad Petrović, Šumarski fakultet Beograd, Serbia