Author(s):
1. Stefan Đinić, Mašinski fakultet Univerziteta u Beogradu, Serbia
2. Vladimir Petrović, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
3. Predrag Mrdja, Mašinski fakultet Univerziteta u Beogradu, Serbia
4. Slobodan Popovic, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia

Final paper