- Author: Friedman George
- Language: German
- Year: 2009
- Author: Lenzen Manuela
- Language: German
- Year: 2002
- Author: Schraut Sylvia
- Language: German
- Year: 2011
- Author: Lisa Nienhaus
- Language: German
- Year: 2009
- Author: Arnulf Zitelmann
- Language: German
- Year: 2004
- Author: Sebastian Conrad
- Language: German
- Year: 2007
- Author: Annette C Anton
- Language: German
- Year: 2009
- Author: Wilhelm Schmid-Bode
- Language: German
- Year: 2008