https://digital.katalog.queersearch.org/s/katalog/item/40059, “Der Mitteldeutsche Bandenführer: Mein Leben hinter Kerkermauern”, https://digital.katalog.queersearch.org/s/katalog/item/49432, QueerSearch, accessed 4. Mai 2025, https://digital.katalog.queersearch.org/s/katalog/item/25480