- Author: Bernhard Weller, Claudia Hemmerle, Sven Jakubetz, Stefan Unnewehr
- Language: English
- Year: 2012
- Author: Bernhard Weller, Claudia Hemmerle, Sven Jakubetz, Stefan Unnewehr
- Language: German
- Year: 2012
- Author: Bernhard Weller, Claudia Hemmerle, Sven Jakubetz, Stefan Unnewehr
- Language: English
- Year: 2010