https://digital.katalog.queersearch.org/s/katalog/item/41874, “Zwölf Tage in Persien: Reise über die Bakhtiari-Berge”, https://digital.katalog.queersearch.org/s/katalog/item/47220, QueerSearch, accessed 29. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/19483