Author(s):
1. Srđan Vuković, Univerzitet u Istočnom Sarajevu, Tehnološki fakultet Zvornik, Republic of Srpska, Bosnia and Herzegovina
2. Danijela Rajić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
3. Aleksandar Vuković, Univerzitet u Novom Sadu, Fakultet zehničkih nauka, Serbia
4. Svetlana Pelemiš, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina