VELLA, Alexandra. Aspects of Multilingualism in European Language History. Příprava vydání Kurt Braunmüller a Gisella Ferraresi. [s.l.]: John Benjamins Publishing Company, 2004. (Hamburg Studies on Muliculturalism). Dostupné online. ISBN9027219222. Kapitola Language contact and Maltese intonation: Some parallels with other language varieties, s. 263.
