(en) David Sanjek, "Fans' notes: The horror film fanzine". The Cult Film Reader, Londres, Open University Press, (ISBN978-0-335-21923-0, OCLC746250976), p. 426
(en) Gary Don Rhodes, Horror at the Drive-in: Essays in Popular Americana, McFarland, (ISBN978-0-786-41342-3, OCLC606934557), « Italian Cinema Goes to the Drive-In: The Intercultural Horrors of Mario Bava »
(it) Gabriele Acerbo et Roberto Pisoni, Kill Baby Kill!: Il cinema di Mario Bava, Un mondo a parte, (ISBN978-8-889-48113-4, OCLC860440097), p. 227