https://digital.katalog.queersearch.org/s/katalog/item/44678, “How to Write an Author: Biografische Spurensuche zu Toni Schwabe (1877-1951)”, https://digital.katalog.queersearch.org/s/katalog/item/42171, QueerSearch, accessed 29. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/56141