Maroinoski, N., and I. Nestoroska. “CHANGES IN TOURIST AGENCIES’ OPERATIONS TOWARDS CONTEMPORARY DIGITAL TRENDS”. Tourism International Scientific Conference Vrnjačka Banja - TISC, Vol. 3, no. 1, May 2018, pp. 308-23, http://www.tisc.rs/proceedings/index.php/hitmc/article/view/17.