https://digital.katalog.queersearch.org/s/katalog/item/38990, “Keine Tochter aus gutem Hause : Johanna Elberskirchen (1864-1943)”, https://digital.katalog.queersearch.org/s/katalog/item/49269, QueerSearch, accessed 28. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/35258