https://digital.katalog.queersearch.org/s/katalog/item/43419, “Bibliographische Hinweise zu Zeitschriften-Artikeln Kurt Hillers”, https://digital.katalog.queersearch.org/s/katalog/item/49726, QueerSearch, accessed 28. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/55399