https://digital.katalog.queersearch.org/s/katalog/item/40549 and https://digital.katalog.queersearch.org/s/katalog/item/42965, “Die sexuelle Reaktion”, https://digital.katalog.queersearch.org/s/katalog/item/47507, QueerSearch, accessed 16. Juni 2025, https://digital.katalog.queersearch.org/s/katalog/item/25259