- Author: Müllner Wolfgang
- Language: German
- Year: 1978
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- Language: German
- Year: 2000
- Author: Köhler Marc
- Language: German
- Year: 1996
- Author: Kyriazis-Gouvelis Demetrios L.
- Language: German
- Year: 1984
- Author: Kutschera Frank
- Language: German
- Year: 2003