1. Republic Geodetic Authority, Belgrade, Serbia
2. Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts, Belgrade, Serbia
3. Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts, Belgrade, Serbia + South Ural State University, Institute of Sport, Tourism and Service, Chelyabinsk, Russia
4. National Research Ogarev Mordovia State University, Institute of Electronics and Lighting Engineering, Saransk, Russia
5. National Research Ogarev Mordovia State University, Faculty of Geography, Saransk, Russia