Author(s):
1. Milovan Jotanović, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
2. Vladan Mićić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
3. Stefan Pavlović, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
4. Anto Gajić, Mine and Thermal Power Plant Ugljevik, Republic of Srpska, Bosnia and Herzegovina