- Author: Nicole Just Martin Kintrup
- Language: German
- Year: 2014
- Author: Matthaei Bettina
- Language: German
- Year: 2015
- Author: Graumann Katja
- Language: German
- Year: 2015
- Author: Dusy Tanja
- Language: German
- Year: 2013
- Author: Dusy Tanja
- Language: German
- Year: 2012