1. Anon. 1963. H. P. Robertson. January 27, 1903 – August 26, 1961. In Memoriam. Philadelphia: Society for Industrial and Applied Mathematics. (Includes pieces by A. H. Taub, S. S. Chern, G. C. McVittie, Jon Matthews, Alan Sandage, and L. I. Schiff. Reprinted from the 1962 Journal of the Society for Industrial and Applied Mathematics 10: 737–801.).
2. Fowler, William A. 1962. Howard Percy Robertson. Quarterly Journal of the Royal Astronomical Society 3: 132–135.
3. Greenstein, Jesse L. 1980. Howard Percy Robertson. Biographical Memoirs of the National Academy of Sciences 51: 343–365.
4. Kragh, Helge. 1996. Cosmology and controversy: The historical development of two theories of the universe, 12–17. Princeton: Princeton University Press, 21, 56, 280.
5. Reid, Constance. 1993. The search for E. T. Bell: Also known as John Taine. Washington: Mathematical Association of America.