1. Seismological studies of the Raoul Island eruption, 1964;Adams;N.Z. J. Geol. Geophys.,1967
2. Report on volcanic activities and volcanological studies in Japan for the period from 1979 to 1982;Aramaki,1983
3. Sul periodo eruttivo dell'Etna dal 19 Luglio al 5 Agosto 1899;Arcidiacono,1900
4. Etude du rôle des eaux souterraines dans le mécanisme des éruptions phréatiques;Barat;Doc. BRGM,1986
5. Phreatic activity of Guagua Pichincha volcano (Ecuador) on April 1990;Barberi,1991