1. Department of Energy and Process Engineering, Faculty of Technical Sciences, University of Novi Sad, Novi Sad 21000, Serbia
2. Faculty of Economics, University of Novi Sad, Subotica 24000, Serbia
3. Faculty of Philosophy, University of Novi Sad, Novi Sad 21000, Serbia
4. Department of Environmental Engineering and Occupational Safety and Health, Faculty of Technical Sciences, University of Novi Sad, Novi Sad 21000, Serbia
5. Faculty of Transport and Traffic Engineering, University of East Sarajevo, Doboj 74000, Bosnia and Herzegovina