https://digital.katalog.queersearch.org/s/katalog/item/63661, “Tucholsky über Hiller / Hiller über Tucholsky”, https://digital.katalog.queersearch.org/s/katalog/item/49675, QueerSearch, accessed 28. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/55406