Reads:
Thorn, Matt (2012) "Takahashi Macoto: The Origin of Shōjo Manga Style"
Shamoon, Deborah (2012) "Passionate Friendship: The Aesthetics of Girl Culture in Japan"
"Shoujo Manga’s Lost Generation" by Megan D.: https://www.animefeminist.com/history-shoujo-mangas-lost-generation/