1. Misner, C., et al. (1973).Gravitation (W. H. Freeman and Company, San Francisco).
2. Weinberg, S. (1972).Gravitation and Cosmology (John Wiley & Sons, New York).
3. Thirring, H. (1918).Phys. Z. 19, 22; (1921).Phys. Z. 22, 29; Lense, J., and Thirring, H. (1918).Phys. Z. 19, 156; Adler, R., et al. (1975).Introduction to General Relativity (McGraw-Hill, New York).
4. Shapiro, I. (1980).Phys. Rev. D 22, 2947.
5. Braginsky, B. (1977).Phys. Rev. D 15, 2047.