Author(s):
1. Snežana Petković, University of Banja Luka, Faculty of mechanical engineering,
Republic of Srpska, Bosnia and Herzegovina
2. Boško Đukić, Univerzitet u Istočnom Sarajevu Saobraćajni fakultet Dobo,
Republic of Srpska, Bosnia and Herzegovina
3. Željko Đurić, Faculty of Mechanical Engineering,
Republic of Srpska, Bosnia and Herzegovina