Hawking S. and Penrose R.The Nature of Space and Time. Princeton and Oxford: Princeton University Press,1996. p. 75.
53
Larsen, p. 39
54
Sciama D. The Unity of the Universe. Garden City, N. J.: Doubleday and Company, 1961, p. vii.
55
Hawking S.Sixty Years in a Nutshell. G. W. Gibbons, E. P. S. Shellard and S. J. Rankin, eds. The Future of Theoretical Physics and Cosmology: Celebrating Stephen Hawking’s Contributions to Physics. Cambridge University Press, 2003, (Stephen Hawking 60th Birthday Workshop and Symposium, January 2002). p. 106.
