Autori:
1. Dane Marčeta, Šumarski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
2. Vladimir Petković, Šumarski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
3. Gordana Lakić Globočki, University of Banja Luka, Faculty of mechanical engineering, Republic of Srpska, Bosnia and Herzegovina