ALESSANDRINI, B., and L. LEVATO. “Progressive Estimation of Hypocentres and Three Dimensional Crustal Model”. Annals of Geophysics 33, no. 1 (November 25, 1980): 297–317. Accessed July 17, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/4710.