- Author: Matthew C Gutmann, Lucía Rayas
- Language: Spanish
- Year: 2016
- Author: Matthew C. Gutmann (editor)
- Language: English
- Year: 2003
- Author: Matthew C. Gutmann
- Language: English
- Year: 2006
- Author: Matthew C Gutmann
- Language: English
- Year: 1997
- Author: Matthew C. Gutmann
- Language: English
- Year: 2002