On the Universal Law of Attraction, Including that of Gravitation, as a Particular Case of Approximation Deducible from the Principle that Equal and Similar Particles of Matter Move Similarly, Relatively to Each other. J. K. Smythies
Astrophysics program. Project concepts: Relativistic gravitation experiments R. Decker, P. B. Eby, C. A. Lundquist, J. B Anderson