- Author: Walter Gautschi
- Language: English
- Year: 2016
- Author: Walter Gautschi
- Language: English
- Year: 2004
- Author: Walter Gautschi
- Language: English
- Year: 2012
- Author: Walter Gautschi (auth.)
- Language: English
- Year: 2012
- Author: Walter Gautschi (auth.)
- Language: English
- Year: 2012
- Author: Walter Gautschi (auth.)
- Language: English
- Year: 2012