- Author: Ann M. Penrose Barbara M. Sitko
- Language: English
- Year: 1993
- Author: Roger Penrose Stephen Hawking Abner Shimony Nancy Cartwright
- Language: Hungarian
- Year: 2003
- Author: Penrose Roger
- Language: Italian
- Year: 1992
- Author: Carlo Cercignani Roger Penrose
- Language: English
- Year: 2006
- Author: Dr Shahn Majid John Polkinghorne Roger Penrose Andrew Taylor Alain Connes Michael Heller
- Language: English
- Year: 2012
- Author: Roger Penrose
- Language: Romanian
- Year: 2001
- Author: Albert Einstein John Stachel Roger Penrose
- Language: English
- Year: 1998
- Author: R. Penrose C.J. Isham
- Language: English
- Year: 1986
- Author: George Gamow George Garnow John Hookham Roger Penrose
- Language: English
- Year: 1962
- Author: Erwin Schrodinger Roger Penrose
- Language: English
- Year: 2012