RESTIFICAR, S. D. F.; DAY, M. J.; URICH, P. B. Protection of Karst in the Philippines. Acta Carsologica, Ljubljana, Slovenija, v. 35, n. 1, 2006. DOI: 10.3986/ac.v35i1.248. Disponível em: https://ojs.zrc-sazu.si/carsologica/article/view/248. Acesso em: 25 apr. 2024.