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Rotolo, S.G.; Villa, Igor Maria (2001). 39Ar/40Ar dating of an alkali-granite enclave from Pantelleria island. Periodico di Mineralogia, 70, pp. 269-275. Edizioni Nuova Cultura
Aiuppa, A.; Rotolo, S.G.; Villa, I.M. (1999). Stratigraphy, Geochemistry and Geochronology of a quaternary pyroclastic sequence of the Chichontepec Volcano, El Salvador. Revista Geológica de América Central, 22, pp. 75-86. Universidad de Costa Rica
