Virijević Jovanović, Saša, and Vesna Pijevac. “TOURISM IN FUNCTION OF SUSTAINABLE DEVELOPMENT OF THE GRADAC RIVER IN SERBIA”. Tourism International Scientific Conference Vrnjačka Banja - TISC 3, no. 2 (June 2, 2018): 416-433. Accessed August 24, 2026. http://www.tisc.rs/proceedings/index.php/hitmc/article/view/67.