https://digital.katalog.queersearch.org/s/katalog/item/40561 and https://digital.katalog.queersearch.org/s/katalog/item/40755, “Jan's Wunderhündchen: Ein Kinderstück in sieben Bildern”, https://digital.katalog.queersearch.org/s/katalog/item/48741, QueerSearch, accessed 29. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/17381