Author(s):
1. Darko Knežević, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
2. Sasa Lalos, Republic of Srpska, Bosnia and Herzegovina
3. Mitar Jocanović, Fakultet tehničkih nauka Univerziteta u Novom Sadu, Serbia
4. Velibor Karanović, Faculty of Technical Science, Kosovska Mitrovica, Serbia

Final paper