- Author: Dr. sc. math. Carl August Zehnder (auth.)
- Language: German
- Year: 1985
- Author: Dr. sc. math. Carl August Zehnder (auth.)
- Language: German
- Year: 1991
- Author: Dr. sc. math. Carl August Zehnder (auth.)
- Language: German
- Year: 1987
- Author: Dr. sc. math. Carl August Zehnder (auth.)
- Language: German
- Year: 1998
- Author: Prof. Dr. sc. techn. Kurt Bauknecht Prof. Dr. sc. math. Carl August Zehnder (auth.)
- Language: German
- Year: 1997