Roy Kinnard et Tony Crnkovich, Italian sword and sandal films, 1908-1990, Jefferson, North Carolina, McFarland, (ISBN978-1-4766-6291-6, OCLC952390198)
Thomas Weisser, Spaghetti Westerns--the Good, the Bad and the Violent : a Comprehensive, Illustrated Filmography of 558 Eurowesterns and Their Personnel, 1961-1977, Jefferson, NC, McFarland, (ISBN978-1-4766-1169-3, OCLC894938751)