https://digital.katalog.queersearch.org/s/katalog/item/39845, “Mord und Massenmord im Konzentrationslager Sachsenhausen 1936-1945. Murder and Mass Murder in Sachsenhausen Concentration Camp 1936-1945.”, https://digital.katalog.queersearch.org/s/katalog/item/46602, QueerSearch, accessed 28. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/5974