- Author: Ulrich Schlienz
- Language: German
- Year: 2007
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- Language: German
- Year: 2007
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- Language: German
- Year: 2006
- Author: Dieter Muhs, et al
- Language: German
- Year: 2007
- Author: Clemens Kaesler
- Language: German
- Year: 2007
- Author: Jürgen Eichler
- Language: German
- Year: 2007
- Author: Ulrich Elwert, Alexander Flassak
- Language: German
- Year: 2008