Author(s):
1. Slobodan Popovic, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
2. Nenad Miljić, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
3. Marko Kitanović, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
4. Predrag Mrdja, Mašinski fakultet Univerziteta u Beogradu, Serbia
5. Miroljub Tomić, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia