1. Faculty of Geography, University of Belgrade, Studentski Trg 3/III, 11000 Belgrade, Serbia
2. International Research Academy of Science and Art, Kašikovićeva 1a, 11010 Belgrade, Serbia
3. Balkan Network of Tourism Experts, 11000 Belgrade, Serbia
4. Faculty of Economic Sciences and Business Administration, Transilvania University of Brașov, 500036 Brașov, Romania
5. Department of Social and Communication Sciences, Transilvania University of Brașov, 500036 Brașov, Romania
6. Centre for Mountain Economy, “Costin C. Kiriţescu” National Institute for Economic Research, Romanian Academy, 060021 Bucharest, Romania
7. Academy of Technical Vocational Studies in Belgrade, Katarine Ambrozić 3, 11120 Belgrade, Serbia
8. Faculty of Applied Ecology “Futura”, Metropolitan University, Požeška 83, 11030 Belgrade, Serbia