1. CookProc. Roy. Soc. (A), 1932,137, 559.
2. Taylor and QuinneyPhil. Trans. Roy. Soc. (A),230, 348–49. In a subsequent paper,Ibid., Phil. Trans. Roy. Soc. (A), 1938,145, 1–2, Taylor favours Mohr and Mises-Hencky hypotheses.
3. BeltramiMath. Ann., 1903, 94.
4. HaighBrit. Assoc. Rep., 1921, 324 and 1923, 358.
5. MisesGott. Nach. Math. Phys. Klasse., 1913, 582.