1. Academy of Technical and Art Applied Studies, School of Railway Transport, Belgrade, Serbia
2. Faculty of Electrical Engineering, University of Belgrade, Belgrade, Serbia
3. Faculty of Technical Sciences Čačak, University of Kragujevac, Čačak, Serbia
4. Ministry of Agriculture, Forestry and Water Management of the Republic of Serbia, Belgrade, Serbia + Faculty of Agriculture, University of Belgrade, Belgrade, Serbia
5. Analysis doo, Laboratory of Calibration and Validation, Belgrade, Serbia
6. Faculty of Technology and Metallurgy, Belgrade, Serbia
7. Technical Faculty Bor, University of Belgrade, Bor, Serbia + Faculty of Electrical Engineering, University of Belgrade, Belgrade, Serbia