GRESTA, S.; PRIVITERA, E.; LEOTTA, A.; GASPERINI, P. Analysis of the intermittent volcanic tremor observed at Mt. Etna, Sicily during March-May 1987. Annals of Geophysics, [S. l.], v. 39, n. 2, 1996. DOI: 10.4401/ag-3979. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3979. Acesso em: 5 jul. 2022.