- Author: Zubke-von Thünen Thomas
- Language: German
- Year: 1999
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- Language: German
- Year: 2008
- Author: Winter Barbara
- Language: German
- Year: 2004
- Author: Welge Jonas
- Language: German
- Year: 2017
- Author: Ullner Rowina
- Language: German
- Year: 2017
- Author: Schubert Daniel
- Language: German
- Year: 2009
- Author: Schmidt Jürgen F.
- Language: German
- Year: 2003