1. The Cosmological Constants
2. DICKE, R. H.: The Theoretical Significance of Experimental Relativity. New York, 1964. See also the following papers: Stellar Evolution with varying G (1963). Icarus and Relativity (1965). The Equivalence of Inertial and Gravitational Mass (1965). Implications for Cosmology of Stellar and Mach's Principle and a Relativistic Theory of Gravitation (1961). Also: Galactic Evolution Rates (1961). BRANS, C. and DICKE, R. H.: Mach's Principle and a Relativistic Theory of Gravitation (1961). BRANS, C.: Mach's Principle and a Varying Gravitational Constant. Dissertation, Princeton, 1961. DICKE, R. H. and PEEBLES, P. J.: Gravitation and Space Science (1965). MORGAN, W. J., STONER, J. O. and DICKE, R. H.: Periodicity of Earthquakes and the Invariance of the Gravitational Constant (1960). Compare also BRILL, D. R.: Review of Jordan's Extended Theory of Gravitation. Intern. School of Physics “Enrico Fermi”, Varenna, 1961. EHLERS, J. (private communication).
3. GREENSTEIN, J.: Intern. Symp. Dallas, 1963. See also ROBINSON, I., SCHILD, A. and SCHÜCKING, E. L.: Quasi-Stellar Sources and Gravitational Collapse. Chicago, 1965. Furthermore: BAHCALL, T. N., SARGENT, W. L. W. and SCHMIDT, M.: Ap. J. 149, L 11(1967). Phys. Rev. Letters 19, 1294(1967).