PINT, J. J. Vulcanospeleology in Saudi Arabia. Acta Carsologica, Ljubljana, Slovenija, v. 35, n. 1, 2006. DOI: 10.3986/ac.v35i1.247. Disponível em: https://ojs.zrc-sazu.si/carsologica/article/view/247. Acesso em: 20 apr. 2024.