Trmčić, Snežana, and Dragić Živković. 2017. “TOURIST VISITS TO SPAS OF SERBIA - GUIDELINES FOR IMPROVING THE OPPORTUNITIES FOR DEVELOPMENT OF TOURISM PRODUCTS”. Tourism International Scientific Conference Vrnjačka Banja - TISC 2 (1), 509-26. http://www.tisc.rs/proceedings/index.php/hitmc/article/view/158.