1. Belenkiy, Ari. 2013. The waters I am entering no one yet has crossed: Alexander Friedman and the origins of modern cosmology. Proceedings of the Conference Origins of the Expanding Universe, ed. M. Way and D. Hunter. Astron. Soc. Pacific 471: 71–96.
2. Cherwell Papers, 1931. Nuffield College, Oxford University. Typed drafts of the Lindemann-Einstein pamphlet summaries of May 1931 are available in file D59 (1–17). (Also see [Fox 2018] note 34.)
3. Clark, Ronald. W. 1972. Einstein: The Life and Times. New York, Avon Books. This is the paperback reprint of the first edition of 1971.
4. Einstein, Albert. 1917. Kosmologischen Betrachtungen zur allgemeinen Relativitätstheorie. Sitzungsberichte der Königlich Preuss. Akad.:142–152. Repr. & trans. in The Principle of Relativity. New York: Dover.
5. Einstein, Albert. 1930. The Brose Nottingham lecture transcript appeared in print three times. The original translation: New York Times Sunday June 8th 1930. The next publication was: “Professor Einstein’s Address at Nottingham University,” Science, Nw Series, Vol. 71, No. 1850 (June 13, 1930), 608–610. It was also reprinted as “Einstein’s Views on Space, The Journal of the Royal Astronomical Society of Canada, Vol. 24, No. 8 (October, 1930), pp. 284–288.