1. C. B. Mast andJ. Strathdee:Proc. R. Soc. London, Ser. A,252, 476 (1959);J. L. Synge:Relativity: The General Theory (North-Holland, Amsterdam, 1960);A. D. Fokker:Time and Space, Weight and Inertia, translated byD. Bijl (Pergamon, Oxford, 1965).
2. B. Mashhoon andD. S. Theiss:Phys. Rev. Lett.,49, 1542 (1982);B. Mashhoon andD. S. Theiss: University of Cologne report (1982);B. Mashhoon: inProceedings of the Third Marcel Grossmann Meeting on General Relativity, edited byHu Ning (North-Holland, New York, N.Y., 1983), p. 1505;B. Mashhoon, F. W. Hehl andD. S. Theiss:Gen. Rel. Grav.,16, 711 (1984);B. Mashhoon:Gen. Rel. Grav.,16, 311 (1984);D. S. Theiss: Ph. D. thesis, University of Cologne (Köln, 1984);B. Mashhoon:Found. Phys.,15, 497 (Bergmann Festschrift, 1985);D. S. Theiss:Phys. Lett. A,109, 19 (1985);B. Mashhoon: inRelativity in Celestial Mechanics and Astrometry, edited byJ. Kovalevsky andV. A. Brumberg (Reidel, Dordrecht, 1986), p. 407;B. Mashhoon andD. S. Theiss:Phys. Lett. A,115, 333 (1986). Further work in this direction with emphasis on the motion of artificial satellites about the Earth is contained inN. Ashby andB. Bertotti:Phys. Rev. Lett.,52, 485 (1984);Phys. Rev. D,34, 2246 (1986).
3. C. M. Will:Phys. Rep.,113, 345 (1984).
4. I. I. Shapiro, R. D. Reasenberg, J. F. Chandler andR. W. Babcock:Phys. Rev. Lett.,61, 2643 (1988). See alsoB. Bertotti, I. Ciufolini andP. L. Bender:Phys. Rev. Lett.,58, 1062 (1987).
5. Attempts in this direction are contained in:V. A. Brumberg:Bull. Inst. Theor. Astron. (USSR) 6, 733 (1958);R. Baierlein:Phys. Rev.,162, 1275 (1967);M. H. Soffel:Relativity in Astrometry, Celestial Mechanics and Geodesy (Springer-Verlag, Berlin, 1989);V. A. Brumberg andS. M. Kopejkin:Nuovo Cimento B,103, 63 (1989). These works contain references to other relevant studies which have appeared since the early papers ofW. De Sitter:Mon. Not. R. Astron. Soc.,76 699 (1916);77, 155 (1916). A parametrized post-Newtonian theory of lunar motion has been developed byK. Nordtvedt jr.:Phys. Rev. D,7, 2347 (1973):Rep. Prog. Phys.,45, 631 (1982).