1. Novikov, I.D. (1992) Time machine and self-consistent evolution in problems with self-interaction, Phys. Rev. D45, 1989.
2. Misner, C.W., Thome, K.S., and Wheeler, J.A. (1972) Gravitation, J. Wiley, San Francisco.
3. Plato, Timaeus.
4. Kerr, R.P. (1963) Gravitational field of a spinning mass as an example of algebraically special metrics, Phys. Rev. Lett. 11, 238.
5. Carter, B. (1966) Complete and analytic extension of the symmetry axis of Kerr solution of Einstein’s equations, Phys. Rev. 141, 1242.