https://digital.katalog.queersearch.org/s/katalog/item/43643, “ARS EROTICA VETERUM: Das Geschlechtsleben im Altertum”, https://digital.katalog.queersearch.org/s/katalog/item/48512, QueerSearch, accessed 30. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/26572