PRICE, L. Tin mining in the limestone caves of Perlis, Malaysia. Acta Carsologica, Ljubljana, Slovenija, v. 40, n. 3, 2012. DOI: 10.3986/ac.v40i3.63. Disponível em: https://ojs.zrc-sazu.si/carsologica/article/view/63. Acesso em: 3 may. 2024.