ALPARONE, S.; GRESTA, S. Low frequency events at Mt. Etna: some problems and open questions. Annals of Geophysics, [S. l.], v. 39, n. 2, 1996. DOI: 10.4401/ag-3971. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3971. Acesso em: 20 apr. 2024.