- Author: Dorothee Brantz Sasha Disko Georg Wagner-Kyora
- Language: English
- Year: 2012
- Author: Jan Kühnemund Lydia Potts
- Language: German
- Year: 2008
- Author: Jana Binder Johannes Moser Sabine Hess
- Language: German
- Year: 2015
- Author: Janelle Blankenship Tobias Nagl
- Language: English
- Year: 2012
- Author: Adloff Frank
- Language: English
- Year: 2015
- Author: Maruta Herding
- Language: English
- Year: 2014
- Author: Waltraud Ernst & Ilona Horwath
- Language: English
- Year: 2013
- Author: Roger Behrens
- Language: German
- Year: 2004