Calamita F, Coltorti M, Deiana G, Dramis F, Pambianchi G. Neotectonic evolution and Geomorphology of the Cascia and Norcia depressions (Umbria-Marche Apennine). Geog. Fis. Dinam. Quat. 1982;5(2):263-276. Accessed April 3, 2025. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/954