Author(s):
1. Branislav Sredanović, University of Banja Luka, Faculty of mechanical engineering, Republic of Srpska, Bosnia and Herzegovina
2. Gordana Lakić Globočki, University of Banja Luka, Faculty of mechanical engineering, Republic of Srpska, Bosnia and Herzegovina
3. Davorin Kramar, University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
4. Janez Kopač, University of Ljubljana, Faculty of Mechanical Engineering, Slovenia