Born in 1921, Regnoli worked in the film industry between 1953 and 1991 where he wrote over 110 screenplays and directed 11 films.[2][3] Regnoli's work ranged from sword-and-sandal films, westerns, horror and sexy comedies.[2] His final film where he was officially credited as a director was La principessa sul pisello in 1976.[4] Regnoli did uncredited direction on the 1986 melodrama Giuro che ti amo starring Nino D'Angelo.[4]
Curti, Roberto (2016). Diabolika: Supercriminals, Superheroes and the Comic Book Universe in Italian Cinema. Midnight Marquee Press. ISBN978-1-936168-60-6.
Curti, Roberto (2013). Italian Crime Filmography, 1968-1980. McFarland. ISBN978-0786469765.