Erotic comics in Japan an introduction to eromanga - Nagayama, Kaoru 1954- (Amsterdam University Press, 2021)
Originally published as Zōho eromanga sutadiizu: "Kairaku sōchi" toshite no manga nyūmon, (Eromanga Studies, Expanded Edition: An Introduction to Manga as a "Pleasure Apparatus"), Tokyo: Chikuma Shobō, 2014. - Title from publisher's bibliographic system (viewed on 27 Oct 2021)