https://digital.katalog.queersearch.org/s/katalog/item/42138 and https://digital.katalog.queersearch.org/s/katalog/item/42139, “Parrot und Olivier in Amerika: Roman”, https://digital.katalog.queersearch.org/s/katalog/item/46866, QueerSearch, accessed 16. Juni 2025, https://digital.katalog.queersearch.org/s/katalog/item/19921