1. Tolman, R. C. (1969).Relativity, Thermodynamics and Cosmology (Oxford, Clarendon Press).
2. Bailyn, M. (1973).Phys. Rev. D,8, 1036.
3. Vickers, P. A. (1973).Ann. Inst. Henri Poincaré A,18, 137.
4. Pavlov, N. V. (1976).Izv. Vyssh. Uchebn. Zaved. Fiz., No. 4, 107.
5. Pavlov, N. V., and Bronnikov, K. A. (1976).Izv. Vyssh. Uchebn. Zaved. Fiz., No. 7, 106.