[1] University of Novi Sad, Faculty of Technical Sciences, Department of Civil Engineering and Geodesy, Trg Dositeja Obradovica 6, Novi Sad,21000, Serbia
[2] Tehnikum Taurunum-High Engineering School of Professional Studies, Nade Dimić 4, Beograd,11080, Serbia
[3] University of Novi Sad, Faculty of Civil Engineering, Kozaračka 2a, Subotica,24000, Serbia