Besides the many examples in literature and film, I have listed below some useful books and websites on subjects related to Girls Underground, including relevant folklore and mythology.
Valente, Catherynne M. “Follow the Yellow Brick Road: Katabasis and the Female Hero in Alice in Wonderland, The Wizard of Oz, and The Nutcracker Ballet,” presented at Wiscon, Feminism in SF/F Convention, 2005. [This is the closest discussion of what could be seen as the Girls Underground archetype that I have ever seen outside my own work. A fascinating essay comparing these three popular stories to the myths of Persephone and Inanna. Can be found on her website.]
Estes, Clarissa Pinkola. Women Who Run With the Wolves. Ballantine Books, 1996.
Grimm, Jacob, et al. The Annotated Brothers Grimm. WW Norton & Co, 2004.
Ragan, Kathleen. Fearless Girls, Wise Women, and Beloved Sisters: Heroines in Folktales from Around the World. WW Norton & Co, 2000.
Tatar, Maria. Secrets Beyond the Door : The Story of Bluebeard and His Wives. Princeton University Press, 2004.
Tatar, Maria. The Hard Facts of the Grimms’ Fairy Tales. Princeton University Press, 2003.
Vaclavik, Kiera. Uncharted Depths: Descent Narratives in English and French Children’s Literature, Legenda, 2010.
Zipes, Jack. The Trials and Tribulations of Little Red Riding Hood. Routledge, 1993.
Folklore and Mythology Electronic Texts – tales by type
Sur La Lune Fairy Tales
Cabinet Des Fees – a journal of fairytales
Journeying and Fairytales – an intersection with shamanism
Down the Rabbit Hole – on TvTropes
Alice in the Internet
Fuck Yeah Labyrinth