Autori:
1. Milan Sljivic, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
2. Milija Kraišnik, University of East Sarajevo, Faculty for Mechanical Engineering East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
3. Jovica Ilic, Republic of Srpska, Bosnia and Herzegovina
4. Jelica Anic, Republic of Srpska, Bosnia and Herzegovina

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