- Author: Christoph Platen
- Language: German
- Year: 1997
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- Year: 1985
- Author: Joachim Grzega
- Language: German
- Year: 2001
- Author: Dietmar Rieger
- Language: German
- Year: 1976
- Author: Martin-Dietrich Glessgen
- Language: German
- Year: 1997
- Author: Yvonne Kiegel-Keicher
- Language: German
- Year: 2005