Author(s):
1. Dragan Čukanović, Faculty of Technical Sciences, University of Priština, Serbia
2. Aleksandar Radaković, State University of Novi Pazar, Serbia
3. Gordana Bogdanovic, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
4. Dragan Milosavljevic, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
5. Vladimir Geroski, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia