Caloi, P. “Sulla Dispersione Delle Onde Sismiche nell’ambito Delle Altissime Frequenze”. Annals of Geophysics 10, no. 3-4 (November 25, 1957): 193–208. Accessed April 19, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5907.