https://digital.katalog.queersearch.org/s/katalog/item/47452, “Der einsame König : (Erinnerungen an Ludwig II. von Bayern)”, https://digital.katalog.queersearch.org/s/katalog/item/51168, QueerSearch, accessed 30. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/35283