https://digital.katalog.queersearch.org/s/katalog/item/39335, “Invisible Lives. The Erasure of Transsexual and Transgendered People.”, https://digital.katalog.queersearch.org/s/katalog/item/47802, QueerSearch, accessed 15. März 2025, https://digital.katalog.queersearch.org/s/katalog/item/5453