1. Rosen, N. (1973).Gen. Rel. Grav.,4, 435.
2. Rosen, N. (1974).Ann. Phys. (N.Y.),84, 455.
3. Will, C. M. (1981).Theory and Experiment in Gravitational Physics, (Cambridge University Press, Cambridge).
4. Stoeger, W. R. (1983). InProceedings of the III Marcel Grossmann meeting in General Relativity, Hu Ning, ed. (North Holland Publishing Company, Amsterdam).
5. Stoeger, W. R., Whitman, A. P., Knill, R. J. (1985).J. Math. Phys.,26, 2032.