- Author: Hartmut Rensen, Wolfgang Büscher, Rolf A. Schütze, Hans-Günther Borck
- Language: German
- Year: 2007
- Author: Hans-Günther Borck, Stefan Smid, Uwe Gerken, Mathias Rohe
- Language: German
- Year: 2007
- Author: Hans-Jürgen Ahrens, Hans-Günther Borck, Hans-Eike Keller, Barbara Völzmann-Stickelbrock
- Language: German
- Year: 2010
- Author: Hanns Prütting, Volker Michael Jänich, Hans-Günther Borck
- Language: German
- Year: 2005