- Author: B. G. Sidharth
- Language: English
- Year: 2008
- Author: Steven W. Stahler Francesco Palla
- Language: English
- Year: 2004
- Author: Daniel J. Schroeder
- Language: English
- Year: 1999
- Author: Diane Fisher Miller
- Language: English
- Year: 1998
- Author: Paul Murdin
- Language: English
- Year: 2001
- Author: Wolfgang Steinicke Richard Jakiel
- Language: English
- Year: 2006
- Author: Stephen W. Hawking G. F. R. Ellis P. V. Landshoff D. R. Nelson D. W. Sciama S. Weinberg
- Language: English
- Year: 1994
- Author: Michael Lockwood
- Language: English
- Year: 2005
- Author: Lucy-Ann McFadden Paul Weissman Torrence Johnson
- Language: English
- Year: 2006
- Author: Christian Iliadis
- Language: English
- Year: 2007