- Author: Edwin L. Klingelhofer (auth.)
- Language: English
- Year: 1989
- Author: Mag. Dr. Regina Lackner (auth.)
- Language: German
- Year: 2004
- Author: Jean-Pierre Aubin (auth.)
- Language: English
- Year: 2014
- Author: Sarah Fenstermaker Berk (auth.)
- Language: English
- Year: 1985