Cycles of Time: An Extraordinary New View of the Universe

by Roger Penrose

B. Carter (1974), ‘Large number coincidences and the anthropic principle in cosmology’, in IAU Symposium 63: Confrontation of Cosmological Theories with Observational Data, Reidel, pp. 291–8. John D. Barrow, Frank J. Tipler (1988), The anthropic cosmological principle, Oxford University Press.