- Author: Professor Dr. Jochen Hoefs (auth.)
- Language: English
- Year: 2004
- Author: Professor Dr. Jochen Hoefs (auth.)
- Language: English
- Year: 1987
- Author: Professor Dr. Jochen Hoefs (auth.)
- Language: English
- Year: 1997
- Author: Professor Dr. Jochen Hoefs (auth.)
- Language: English
- Year: 1980