- Author: Michael Maurer
- Language: German
- Year: 2014
- Author: Michael Maurer
- Language: German
- Year: 2010
- Author: Michael Maurer
- Language: German
- Year: 2016
- Author: Michael Maurer
- Language: German
- Year: 1998
- Author: Michael Maurer
- Language: German
- Year: 1999