- Author: Vieweg Hans-Günther, Hilpert Hanns Günther
- Language: German
- Year: 1993
- Author: Schroeder Roland
- Language: German
- Year: 1953
- Author: Röthlingshöfer Karl Ch., Sprenger Rolf-Ulrich
- Language: German
- Year: 1977
- Author: Reinhard Michael, Schmalholz Heinz
- Language: German
- Year: 1996
- Author: Oppenländer Karl Heinrich
- Language: German
- Year: 1997