Krasteva, Rouska, and Teodora Kiryakova-Dineva. “Re-Thinking the Role of Rural Tourism. Potentials for a Sustainable Transborder Tourism in the Area Bulgaria-Greece”. European Journal of Sustainable Development 7, no. 2 (June 1, 2018): 51. Accessed April 24, 2024. https://www.ecsdev.org/ojs/index.php/ejsd/article/view/639.