By Roger Penrose
By Roger Penrose, sir-roger-penrose
By George Gamow, Roger Penrose
By Shahn Majid, Alain Connes, Roger Penrose, Michael Heller, John C. Polkinghorne, Andrew N. Taylor
By Roger Penrose, Brian Aldiss
By Penrose, Roger, Roger Penrose
By Erwin Schrodinger, Roger Penrose