^Yūji Tajiri, quoted in Sharp, p. 315 indicates that the Roman Pornos, following the pattern set up in pink films were shown in triple-bills. When only two Nikkatsu films were released for a particular month, the third film was an independently-produced film distributed by Nikkatsu.
^ abWeisser, Thomas; Yuko Mihara Weisser (1998). Japanese Cinema Encyclopedia: The Sex Films. Miami: Vital Books : Asian Cult Cinema Publications. p. 127. ISBN1-889288-52-7
^Sharp, Jasper (2008). Behind the Pink Curtain: The Complete History of Japanese Sex Cinema. Guildford: FAB Press. pp. 272, 291. ISBN978-1-903254-54-7
Sharp, Jasper (2008). Behind the Pink Curtain: The Complete History of Japanese Sex Cinema. Guildford: FAB Press. ISBN978-1-903254-54-7 Sharp, Jasper (2008). Behind the Pink Curtain: The Complete History of Japanese Sex Cinema. Guildford: FAB Press. ISBN978-1-903254-54-7 Sharp, Jasper (2008). Behind the Pink Curtain: The Complete History of Japanese Sex Cinema. Guildford: FAB Press. ISBN978-1-903254-54-7
Weisser, Thomas; Yuko Mihara Weisser (1998). Japanese Cinema Encyclopedia: The Sex Films. Miami: Vital Books : Asian Cult Cinema Publications. ISBN1-889288-52-7 Weisser, Thomas; Yuko Mihara Weisser (1998). Japanese Cinema Encyclopedia: The Sex Films. Miami: Vital Books : Asian Cult Cinema Publications. ISBN1-889288-52-7 Weisser, Thomas; Yuko Mihara Weisser (1998). Japanese Cinema Encyclopedia: The Sex Films. Miami: Vital Books : Asian Cult Cinema Publications. ISBN1-889288-52-7