https://digital.katalog.queersearch.org/s/katalog/item/40708, “Behold a Pale Horse: A Novel of Homosexuals in the Nazi Holocaust”, https://digital.katalog.queersearch.org/s/katalog/item/48647, QueerSearch, accessed 14. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/16914