Caloi, P. “Caratteristiche Della Crosta Terrestre Dalle Alpi Agli Appennini”. Annals of Geophysics 10, no. 3-4 (November 25, 1957): 189–192. Accessed April 16, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5906.