https://digital.katalog.queersearch.org/s/katalog/item/65012, “Transsexualism and Transvestism as Psycho-somatic and Somato-psychic Syndromes: Transsexualism and Transvestism - A Symposium, held before the Association for the Advancement of Psychotherapy, December 18th, 1953”, https://digital.katalog.queersearch.org/s/katalog/item/41997, QueerSearch, accessed 15. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/56196