L. Piccini, U. Sauro, J. De Waele, and P. Mietto , Trans., “THE ITALIAN REGISTER OF NATURAL HYPOGEAN GEOSITES: A PRELIMINARY REPORT”, AMQ, vol. 18, no. 1, pp. 155–162, May 2005, Accessed: Jul. 16, 2024. [Online]. Available: https://amq.aiqua.it/index.php/amq/article/view/481