https://digital.katalog.queersearch.org/s/katalog/item/41982, “Odd Man Out: Homosexuality in Men & Women : With a Foreword by Kenneth Walker”, https://digital.katalog.queersearch.org/s/katalog/item/49044, QueerSearch, accessed 1. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/19603