Virijević Jovanović, S. and Pijevac, V. (2018) “TOURISM IN FUNCTION OF SUSTAINABLE DEVELOPMENT OF THE GRADAC RIVER IN SERBIA”, Tourism International Scientific Conference Vrnjačka Banja - TISC, 3(2), pp. 416-433. Available at: https://tisc.rs/proceedings/index.php/hitmc/article/view/67 (Accessed: 17August2026).