https://digital.katalog.queersearch.org/s/katalog/item/45546, “The Gutter Art of Stephen Varble Genderqueer Performance Art in the 1970s, Fotographs by Greg Day 06.11.2021-21.03.2022”, 2021, QueerSearch, accessed 1. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/33852