- Author: Jan Knippers, Jan Cremers, Markus Gabler, Julian Lienhard
- Language: English
- Year: 2011
- Author: Jan Knippers, Jan Cremers, Markus Gabler, Julian Lienhard
- Language: German
- Year: 2010
- Author: Jan Knippers, Jan Cremers, Markus Gabler, Julian Lienhard
- Language: English
- Year: 2011
- Author: Jan Knippers Jan Cremers Markus Gabler Julian Lienhard
- Language: English
- Year: 2011