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W. de Sitter.,” On Einstein’s Theory of Gravitation and Its Astronomical Consequences,” Monthly Notices of the Royal Astronomical Society, Vol. 78, No. 3, 1917, pp. 3-28.

has been cited by the following article:

• TITLE: A Model for a Spherically Symmetric Space Generated by a Spherical Gravitational Source and a Gravitational Medium with Constant Mass Density

  AUTHORS: Nikolaj N. Popov, Vladimir I. Tsurkov

  KEYWORDS: Spherically Symmetric Space with Discontinuous Scalar Curvature; Generalized Schwarzschild Metric; Radial Geodesic; Black Hole; Dark Energy

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.3 No.2A, June 14, 2013

  ABSTRACT: A metric on a spherically symmetric space generated by a spherical source of gravity and filled with a gravitational medium is constructed, and criteria for the continuity of this metric on the entire space (which is equivalent to the absence of black holes) are found. Properties of radial geodesics under various constraints on the size of the gravitational source, its mass, and the mass density of the gravitational medium are studied.