HEDERVARI, P. Suggestion for a new classification of earthquakes according to the focal depth. Annals of Geophysics, [S. l.], v. 17, n. 3, p. 369–378, 1964. DOI: 10.4401/ag-5214. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5214. Acesso em: 20 jan. 2022.