1. Kompaneyets, A. S. (1962).Theoretical Physics (Dover, New York), p. 191.
2. Spector, M. (1972).Methodological Foundations of Relativistic Mechanics (University of Notre Dame, Notre Dame, Indiana), pp. 93?95.
3. Robertson, H. P. (1949).Rev. Mod. Phys.,21, 378.
4. Robertson, H. P., and Noonan, Th. W. (1968).Relativity and Cosmology (W. B. Saunders Company, Philadelphia).
5. Michelson, A. A., and Morley, E. H. (1887).Am. J. Sci.,34, 333.