https://digital.katalog.queersearch.org/s/katalog/item/39117, https://digital.katalog.queersearch.org/s/katalog/item/39118, and https://digital.katalog.queersearch.org/s/katalog/item/41165, “Quell der Einsamkeit”, https://digital.katalog.queersearch.org/s/katalog/item/46721, QueerSearch, accessed 3. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/5236