
- Author: Helmut Krasser
- Language: German
- Year: 1995

- Author: John Gibert
- Language: English
- Year: 1995

- Author: Nielsen Thomas Heine
- Language: English
- Year: 2002

- Author: Gunther Gottlieb
- Language: German
- Year: 1973

- Author: Peter Herrmann
- Language: German
- Year: 1968

- Author: John Glucker
- Language: English
- Year: 1978

- Author: Agathe Thornton
- Language: English
- Year: 1984

- Author: Samuel Vollenweider
- Language: German
- Year: 1985

- Author: Volker Langholf
- Language: German
- Year: 1971

- Author: Peter Kneissl
- Language: German
- Year: 1970