- Author: Stephan Zschocke, Hans-Christian Hansen, et al
- Language: English
- Year: 2012
- Author: Stephan Zschocke Hans-Christian Hansen
- Language: German
- Year: 2011
- Author: Hans Jurgen Hansen
- Language: German
- Year: 1998
- Author: Hans Jurgen Hansen
- Language: German
- Year: 1998