https://digital.katalog.queersearch.org/s/katalog/item/44249, “Berlin Coquette: Prostitution and the New German Woman, 1890-1933”, https://digital.katalog.queersearch.org/s/katalog/item/49108, QueerSearch, accessed 2. Juli 2025, https://digital.katalog.queersearch.org/s/katalog/item/27720