- Author: Scientific American
- Language: English
- Year: 1997
- Author: Scientific American
- Language: English
- Year: 1998
- Author: Scientific American
- Language: English
- Year: 2002
- Author: Scientific American
- Language: English
- Year: 2004
- Author: Scientific American
- Language: English
- Year: 2003
- Author: Scientific American
- Language: English
- Year: 1993
- Author: Scientific American
- Language: English
- Year: 1995
- Author: Scientific American
- Language: English
- Year: 1997
- Author: Scientific American
- Language: English
- Year: 2004
- Author: Scientific American
- Language: English
- Year: 2006