1. Pipkin, A. C., & R. S. Rivlin, Z. Angew. Math. Phys. 16, 313?326 (1965).
2. Owen, D. R., Arch. Rational Mech. Anal. 31, 91?112 (1968).
3. Lee, E. H., & D. T. Liu, J. Appl. Phys. 38, 19?27 (1967).
4. Truesdell, C., & W. Noll, The Non-Linear Field Theories of Mechanics. Handbuch der Physik, b, III/2, edited by S. Flügge. Berlin-Göttingen-Heidelberg: Springer 1965.
5. Hill, R., The Mathematical Theory of Plasticity. Oxford: Clarendon Press 1950.