https://digital.katalog.queersearch.org/s/katalog/item/44523, “Philosophin einer "neuen Ethik": Helene Stöcker (1869-1943)”, https://digital.katalog.queersearch.org/s/katalog/item/50443, QueerSearch, accessed 29. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/28217