Author(s):
1. Vesna Gojković Cvjetković, University of East Sarajevo, Faculty of Technology, Republic of Srpska, Bosnia and Herzegovina
2. Željka Marjanović-Balaban, Republic of Srpska, Bosnia and Herzegovina
3. Dragan Vujadinović, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
4. Milan Vukić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina