- Author: Benjamin Cohen
- Language: English
- Year: 2015
- Author: Jan Michael Bauer
- Language: German
- Year: 2006
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- Language: German
- Year: 1993
- Author: Unger Dagmar
- Language: German
- Year: 2005
- Author: Sandquist Christian
- Language: German
- Year: 2018
- Author: Reinhard Thorsten
- Language: German
- Year: 1998