Robertson, H. P. (1928). "Bemerkung über separierbare Systeme in der Wellenmechanik". Mathematische Annalen (dalam bahasa German). 98 (1): 749–752. doi:10.1007/BF01451624. ISSN 0025-5831. {{cite journal}}: |ref=harv tidak validPemeliharaan CS1: Bahasa yang tidak diketahui (link)
Robertson, H. P. (1928). "On Relativistic Cosmology". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 7. 5 (31): 835–848. doi:10.1080/14786440508564528.
Robertson, H. P. (April 1937). "Dynamical effects of radiation in the solar system". Monthly Notices of the Royal Astronomical Society. 97. Royal Astronomical Society: 423–438. Bibcode:1937MNRAS..97..423R. doi:10.1093/mnras/97.6.423. {{cite journal}}: |ref=harv tidak validPemeliharaan CS1: DOI bebas tanpa ditandai (link)
Robertson, H. P. (1938). "Note on the preceding paper: The two body problem in general relativity". The Annals of Mathematics. 2. 39: 101–104. doi:10.2307/1968715. ISSN 0003-486X. {{cite journal}}: |ref=harv tidak valid
Society for Industrial and Applied Mathematics (December 1962). "H. P. Robertson: 1903–1961". Journal of the Society for Industrial and Applied Mathematics. 10 (4): 741–750. JSTOR 2098919.