Author(s):
1. Goran Jotic, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
2. Miodrag Hadžistević, Fakultet tehničkih nauka Univerziteta u Novom Sadu, Serbia
3. Živko Pejašinović, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
4. Branko Štrbac, Fakultet tehničkih nauka Univerziteta u Novom Sadu, Serbia