"Volcanic history of Ventotene"Arquivado 19 de xullo de 2011 en Wayback Machine.. Annamaria Perrotta, Claudio Scarpati, Lisetta Giacomelli and Anna Rita Capozzi, "Proximal facies of a caldera forming eruption: the Parata Grande Tuff at Ventotene Island (Italy)." Journal of Volcanology and Geothermal Research 1996.
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"Volcanic history of Ventotene"Arquivado 19 de xullo de 2011 en Wayback Machine.. Annamaria Perrotta, Claudio Scarpati, Lisetta Giacomelli and Anna Rita Capozzi, "Proximal facies of a caldera forming eruption: the Parata Grande Tuff at Ventotene Island (Italy)." Journal of Volcanology and Geothermal Research 1996.