Tanács, Eszter. “Koulov, B. And Zhelezov, G. (eds): Sustainable Mountain Regions: Challenges and Perspectives in Southeastern Europe”. Hungarian Geographical Bulletin 66, no. 1 (March 31, 2017): 77–80. Accessed November 8, 2026. https://ojs.mtak.hu/index.php/hungeobull/article/view/567.