1. Odqvist, F. K. G., Proc. IUTAM Symp. Second Order Effects in Elasticity, Plasticity and Fluid Dynamics (Haifa, 1962).
2. Cf. Saint-Venant, B. De., C.R. Acad. Sci., Paris, 73, 1181 (1871).
3. Todhunter, I., and Pearson, K., History of Elasticity and Strength of Materials, 2, Pt. 1, 164 (1893).
4. Bragg, Lawrence, Nature, 149, 511 (1942); Phys. Soc., 26 (1948).
5. Greenberg, H. J., Dorn, W. S., and Wetherell, E. H., Plasticity, 279 (Pergamon Press, 1960).