- Author: Franz Josef Gruber Rainer Joeckel (auth.)
- Language: German
- Year: 2009
- Author: Franz Josef Gruber Rainer Joeckel (auth.)
- Language: German
- Year: 2017
- Author: Franz Josef Gruber Rainer Joeckel (auth.)
- Language: German
- Year: 2014
- Author: Franz Josef Gruber Rainer Joeckel (auth.)
- Language: German
- Year: 2012
- Author: Franz Josef Gruber Rainer Joeckel (auth.)
- Language: German
- Year: 2011
- Author: Franz Josef Gruber Rainer Joeckel (auth.)
- Language: German
- Year: 2009