Author(s):
1. Ivan Ćirić, Faculty of Mechanical Engineering in Niš, Serbia
2. Žarko Ćojbašić, Faculty of Mechanical Engineering in Niš, Serbia
3. Vlastimir Nikolic, Faculty of Mechanical Engineering in Niš, Serbia
4. Milica Ćirić, Faculty of Civil Engineering and Architecture in Niš, Serbia
5. Predrag Živković, Faculty of Mechanical Engineering in Niš, Serbia
6. Ivan Pavlović, Faculty of Mechanical Engineering in Niš, Serbia
7. Emina Petrovic, Faculty of Mechanical Engineering in Niš, Serbia

Final paper