Marino, Antonio. “Nota Preliminare Sul Fenomeno Glaciologico Della Grotta Del Gelo (Monte Etna): Preliminary Note on the Glaciologic Phenomenon of the Cave of Frost (Mt. Etna)”. Geografia Fisica e Dinamica Quaternaria 15, no. 1-2 (July 9, 2024): 127–132. Accessed December 21, 2024. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/737.