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- Language: German
- Year: 2000

- Author: Czaja Marek
- Language: German
- Year: 2006

- Author: Clostermeyer Claus-Peter
- Language: German
- Year: 1983

- Author: Burg Peter
- Language: German
- Year: 1974

- Author: Brakensiek Stefan, Bredow Corinna von, Näther Birgit
- Language: German
- Year: 2014