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- Language: German
- Year: 1998
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- Language: German
- Year: 1974
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- Language: German
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- Author: Cécora James
- Language: English
- Year: 1991
- Author: Conrad Dieter
- Language: German
- Year: 1965
- Author: Clostermeyer Claus-Peter
- Language: German
- Year: 1983
- Author: Bußmann Ludwig
- Language: German
- Year: 1999
- Author: Busch Anu Elina
- Language: German
- Year: 2006
- Author: Brechenmacher Thomas
- Language: German
- Year: 1996