Author(s):
1. Petar Mandic, Mašinski fakultet Univerziteta u Beogradu, Serbia
2. Mihailo Lazarevic, Mašinski fakultet Univerziteta u Beogradu, Serbia
3. Slavoljub Stojanovic, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
4. Milan Ristović, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia