- Author: Wirsing Martin, Bauer Friedrich Ludwig
- Language: German
- Year: 1991
- Author: Gunther Schmidt Thomas Ströhlein (auth.)
- Language: German
- Year: 1989
- Author: Friedrich L. Bauer Martin Wirsing (auth.)
- Language: German
- Year: 1991
- Author: Prof. Dr. Franz Locher (auth.)
- Language: German
- Year: 1992