TANÁCS, E. Koulov, B. and Zhelezov, G. (eds): Sustainable Mountain Regions: Challenges and Perspectives in Southeastern Europe. Hungarian Geographical Bulletin, [S. l.], v. 66, n. 1, p. 77–80, 2017. DOI: 10.15201/hungeobull.66.1.8. Disponível em: https://ojs.mtak.hu/index.php/hungeobull/article/view/567. Acesso em: 8 nov. 2026.