The story of the German boxing champion Johann Rukeli Trollmann, who as a Sinto was then deported to a concentration camp, and eventually killed.
- “Rukeli”, or Prisoner Number 9841: Boxing champion Johann Trollmann was yet another victim of forced sterilization and racialization. In: Romea. 18.09.2022. http://www.romea.cz/en/news/world/rukeli-or-prisoner-number-9841-boxing-champion-johann-trollmann-was-yet-another-victim-of-forced-sterilization-and
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