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- Language: English
- Year: 1994

- Author: John C. Baez Javier P. Muniain
- Language: English
- Year: 1994

- Author: Agneta Wallin Levinovitz Nils Ringertz
- Language: English
- Year: 2001

- Author: Kerson Huang
- Language: English
- Year: 2007

- Author: Kerson Huang
- Language: English
- Year: 2007

- Author: Karl Berkelman
- Language: English
- Year: 2004

- Author: Willi-Hans Steeb
- Language: English
- Year: 2005

- Author: Paul S. Wesson
- Language: English
- Year: 2006

- Author: Paul S. Wesson
- Language: English
- Year: 1998