Author(s):
1. Marko Miletic, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
2. Ivan Miletic, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
3. Dragan Cvetković, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
4. Nenad Kostić, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
5. Milorad Bojic, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia