- Author: Hans-Joachim Trappe, Hans-Peter Schuster
- Language: German
- Year: 2020
- Author: Hans-Peter Schuster, Hans-Joachim Trappe
- Language: German
- Year: 2009
- Author: Hans-Joachim Trappe Hans-Peter Schuster
- Language: German
- Year: 2017
- Author: Martin Leuwer (editor) Gernot Marx (editor) Hans-Joachim Trappe (editor) Oliver Zuzan (editor)
- Language: German
- Year: 2017
- Author: Hans-Joachim Trappe
- Language: German
- Year: 2009
- Author: Hans-Joachim Trappe
- Language: German
- Year: 2005