———. 1930. “On the Instability of Einstein’s Spherical World.” Monthly Notices of the Royal Astronomical Society, 90, 668.

———. 1952. The Expanding Universe (Cambridge: Cambridge University Press).

Einstein, A. 1917. “Cosmological Considerations on the General Theory of Relativity.” English translation of “Kosmologische Betrachtungen zur allgemeinen Relativitätstheorie,” Sitzungsberichte der Preussischen Akademie der Wissenschaften (PAW), 142.

———. 1919. In PAW, p. 249. Described also in Pais 1982, p. 287.

———. 1927. The Formal Relationship of Riemann’s Curvature Tensor to the Field Equilibria of Gravitation, Mathematische Annalen, 97, 99.