1. Faculty of Sciences, University in Pristina-Kosovska Mitrovica, Kosovska Mitrovica, Serbia
2. Faculty of Technical Sciences, University in Pristina-Kosovska Mitrovica, Kosovska Mitrovica, Serbia
3. Faculty of Medical Sciences, University in Pristina-Kosovska Mitrovica, Kosovska Mitrovica, Serbia
4. Faculty of Ecology and Environmental Protection, University “Union Nikola Tesla”, Belgrade, Serbia
5. Batajnicki Put 23, IHIS Techno-Experts, Belgrade, Serbia
6. Faculty of Science, Department of Physics, University of Novi Sad, Novi Sad, Serbia
7. Faculty of Mining and Geology, University of Belgrade, Belgrade, Serbia