1. Chandrasekhar, S. (1965).Astrophys. J.,142, 1488.
2. Misner, C. W., Thorne, K. S., and Wheeler, J. A. (1973).Gravitation (W. H. Freeman, San Francisco).
3. Will, C. M. (1981).Theory and Experiment in Gravitational Physics (Cambridge University Press, New York).
4. Ni, W.-T., and Zimmermann, M. (1978).Phys. Rev. D,17, 1473.
5. Li, W.-Q., and Ni, W.-T. (1979).J. Math. Phys.,20, 1473.