https://digital.katalog.queersearch.org/s/katalog/item/53180 and https://digital.katalog.queersearch.org/s/katalog/item/53181, “Sexual Expression: A Global Perspective”, https://digital.katalog.queersearch.org/s/katalog/item/48415, QueerSearch, accessed 15. März 2025, https://digital.katalog.queersearch.org/s/katalog/item/55228