[1] Univ Nis, Fac Mech Engn, A Medvedeva 14, Nish 18000, Serbia
[2] Govt Brcko Dist B&H, Bulevara Mira 1, Brcko Dist 76100, Bosnia & Herceg
[3] Univ East Sarajevo, Fac Transport & Traff Engn, Vojvode Misica 52, Doboj 74000, Bosnia & Herceg
[4] TU Berlin, Fac Mech Engn & Traff Syst, Str D 17 Juni 135, D-10623 Berlin, Germany
[5] Univ Business Acad Novi Sad, MEF Fac Appl Management Econ & Finance, Jevrejska 24, Belgrade 11000, Serbia
[6] Al Ghurair Univ, Coll Business Studies, Dubai Int Acad City, POB 37374, Dubai, U Arab Emirates