https://digital.katalog.queersearch.org/s/katalog/item/42352 and https://digital.katalog.queersearch.org/s/katalog/item/42353, “Bad Gays: A Homosexual History”, https://digital.katalog.queersearch.org/s/katalog/item/49005, QueerSearch, accessed 14. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/20554