https://digital.katalog.queersearch.org/s/katalog/item/42694 and https://digital.katalog.queersearch.org/s/katalog/item/42487, “TALK SCHWUZ EXTRA - Im Tempodrom - Open Air”, 1990, QueerSearch, accessed 28. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/31051