Author(s):
1. Mirko Šebez,
Republic of Srpska, Bosnia and Herzegovina
2. Zoran Govedar, Faculty of Forestry, University of Banja Luka,
Republic of Srpska, Bosnia and Herzegovina
3. Milun Krstić, Serbia
4. Srđan Keren, Poland
5. Violeta Babić, Serbia
6. Branko Kanjevac, Serbia