Proceedings of the Cambridge Philosophical Society

Volume 19 (1917–1920)

 * On the expression of a number in the form 𝑎𝑥²+𝑏𝑦²+𝑐𝑧²+𝑑𝑢², by Srinivasa Ramanujan. pp 11–21
 * A Reduction in the number of the Primitive Propositions of Logic, by Jean Nicod. pp 32–41

Volume 24 (1928)

 * The wave mechanics of an atom with a non-Coulomb central field, by D.R.Hartree. pp 89–111