This article is missing information about the film's plot, production, theatrical/home media releases, and reception. Please expand the article to include this information. Further details may exist on the talk page.(March 2019)
^Roberto Chiti; Roberto Poppi; Enrico Lancia. Dizionario del cinema italiano: I film. Gremese, 1991. ISBN8876059350.
^S. T. Joshi (2007). Icons of Horror and the Supernatural: An Encyclopedia of Our Worst Nightmares. Greenwood Publishing Group, 2007. ISBN978-0313337819.