https://digital.katalog.queersearch.org/s/katalog/item/40033 and https://digital.katalog.queersearch.org/s/katalog/item/41967, “The Safer Sex Photobook: Photographs & Video Prints”, https://digital.katalog.queersearch.org/s/katalog/item/48580, QueerSearch, accessed 17. März 2025, https://digital.katalog.queersearch.org/s/katalog/item/19564