1. Execrated – Expatriated – Eradicated. The Lives and Works of German Neurosurgeons Persecuted After 1933;Eisenberg,2017
2. Nazi Germany and The Jews;Friedländer,1977
3. Spirit of Stoke Mandeville: The Story of Sir Ludwig Guttmann;Goodman,1986
4. University Archive Cologne, access: 331/6, No. 37.
5. Geschichte der Behandlung Querschnittsgelähmter in der Bundesrepublik [History of the treatment of spinal cord injuries in the federal republic of Germany];Meinecke;Unfallchirurgie,1988