Author(s):
1. Metod Črešnar, FAKULTETA ZA DIZAJN, TRZIN, Slovenia
2. Ivana Dojčinović, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
3. Sonja Šterman, University of Maribor, Faculty of Mechanical Engineering, Slovenia
4. Marina Jojić, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina