https://digital.katalog.queersearch.org/s/katalog/item/44698 and https://digital.katalog.queersearch.org/s/katalog/item/38231, “2 Männer: Leben, Lieben, Phantasie”, https://digital.katalog.queersearch.org/s/katalog/item/50620, QueerSearch, accessed 14. März 2025, https://digital.katalog.queersearch.org/s/katalog/item/28779