"Low P" and "High P" alkaline magmas from Mt. Etna: their origin and evolution from the study of mineralogy and chemistry of lavas and of olivine-trapped inclusions
Busa Tiziana et al., "Low P" and "High P" alkaline magmas from Mt. Etna: their origin and evolution from the study of mineralogy and chemistry of lavas and of olivine-trapped inclusions, Periodico di mineralogia (Testo stampato) , 68(2), 1999, pp. 163-183