Author(s):
1. Dragana Dimitrijević, Faculty of Mechanical Engineerning, Serbia
2. Mladen Tomić, The School of Higher Technical Professional Education, Niš, Serbia
3. Predrag Živković, Faculty of Mechanical Engineering in Niš, Serbia
4. Mladen Stojiljković, Faculty of Mechanical Engineering in Niš, Serbia
5. Mirko Dobrnjac, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina

Final paper