
- Author: Klaus Schindler (auth.)
- Language: German
- Year: 1993

- Author: Ralf Schmitz (auth.)
- Language: German
- Year: 1993

- Author: Regina Polster (auth.)
- Language: German
- Year: 1994

- Author: Dr. Gert Hoepner (auth.)
- Language: German
- Year: 1994

- Author: Jürgen Warfsmann (auth.)
- Language: German
- Year: 1993

- Author: Andrea Mäßen (auth.)
- Language: German
- Year: 1998

- Author: Herbert Szirota (auth.)
- Language: German
- Year: 1999

- Author: Henning Streubel (auth.)
- Language: German
- Year: 2000

- Author: Christof Graf (auth.)
- Language: German
- Year: 1995