DUVAL, M. Tourism and Preservation Policies in Karst Areas: Comparision Betwen the Škocjan Caves (Slovenia) and the Ardèche Gorge (France). Acta Carsologica, Ljubljana, Slovenija, v. 35, n. 2-3, 2007. DOI: 10.3986/ac.v35i2-3.225. Disponível em: https://ojs.zrc-sazu.si/carsologica/article/view/225. Acesso em: 29 mar. 2024.