- Author: May Georg, Egler Anna, Rees Wilhelm
- Language: German
- Year: 2003
- Author: May Georg, Egler Anna, Rees Wilhelm
- Language: German
- Year: 2017
- Author: May Georg, Egler Anna, Rees Wilhelm
- Language: German
- Year: 2014
- Author: Egler Anna, Rees Wilhelm
- Language: German
- Year: 2006