1. A displacement bound principle for inelastic continua subjected to certain classes of dynamic loading;Martin;J. appl. Mech,1965
2. A more fundamental approach to stress-strain relations;Drucker,1951
3. On the postulate of stability of material in the mechanics of continua;Drucker;Tech. Rept. 562(20)134 from Brown University to the Department of the Navy under Contract Nonr 562(20) NR-64-424,1963
4. Plasticity;Drucker,1960
5. Plastic analysis of structures;Hodge,1959