MENICHETTI, M. Hypogenic caves in Western Umbria (Central Italy). Acta Carsologica, Ljubljana, Slovenija, v. 40, n. 1, 2011. DOI: 10.3986/ac.v40i1.33. Disponível em: https://ojs.zrc-sazu.si/carsologica/article/view/33. Acesso em: 28 apr. 2024.