- Author: Bernd Rudolph Bernd Hofmann Albert Schaber Klaus Schäfer (auth.)
- Language: German
- Year: 2012
- Author: Bernd Hofmann, Bernd Rudolph, Albert Schaber, Klaus Schäfer
- Language: German
- Year: 2007
- Author: Bernd Rudolph Bernd Hofmann Albert Schaber Klaus Schafer
- Language: German
- Year: 2007