https://digital.katalog.queersearch.org/s/katalog/item/44240, “Sexualreform - Sexualpolitik: Die Neue Sexualmoral”, https://digital.katalog.queersearch.org/s/katalog/item/49748, QueerSearch, accessed 30. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/55873