https://digital.katalog.queersearch.org/s/katalog/item/44366 and https://digital.katalog.queersearch.org/s/katalog/item/44367, “Das Weib in anthropologischer und sozialer Betrachtung”, https://digital.katalog.queersearch.org/s/katalog/item/50113, QueerSearch, accessed 7. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/27919