Author(s):
1. Dragan Adamović, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
2. Milentije Stefanović, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
3. Miroslav Plancak, Faculty of Technical Sciences, Department for Production Engineering, Serbia
4. Srbislav Aleksandrovic, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia