Author(s):
1. Gordana Tica, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
2. Azra Rogović-Grubić, Ministry of Foreign Trade and Economic Relations of Bosnia and Herzegovina, Sarajevo, Federation of Bosnia and Herzegovina , Bosnia and Herzegovina
3. Milovan Kotur, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
4. Petar Gvero, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina