Vujadinović, S., D. Šabić, M. Joksimović, R. Golić, M. Gajić, L. Živković, and M. Milinčić. “Possibilities for Mountain-Based Adventure Tourism: The Case of Serbia”. Bulletin of Geography. Socio-Economic Series, no. 19, Mar. 2013, pp. 99–111, doi:10.1515/bog-2013-0007.