1. A More Fundamental Approach to Stress-Strain Relations;Drucker,1951
2. On Von Neumann's Minimax Theorem;Nikaido;Pacific Journal of Mathematics,1954
3. General Theorems For Elastic-Plastic Solids;Koiter,1960
4. On the Postulate of Stability of Materials in the Mechanics of Continua;Drucker;J. Mécan.,1964
5. A Deformation Bounding Theorem for Flow-Law Plasticity;Hodge;Quart. Appl. Math.,1966