https://digital.katalog.queersearch.org/s/katalog/item/44645 and https://digital.katalog.queersearch.org/s/katalog/item/44646, “Gynecologic radiography... Translated from the French by Hans Lehfeldt”, https://digital.katalog.queersearch.org/s/katalog/item/49506, QueerSearch, accessed 16. Juni 2025, https://digital.katalog.queersearch.org/s/katalog/item/28466