https://digital.katalog.queersearch.org/s/katalog/item/42973 and https://digital.katalog.queersearch.org/s/katalog/item/42974, “Robert Mapplethorpe: Die Photographien: 1969-1989”, https://digital.katalog.queersearch.org/s/katalog/item/48507, QueerSearch, accessed 15. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/25269