1. Limit analysis of stability of slopes;Chen;Journal of the Soil Mechanics and Foundations Division, American Society of Civil Engineers,1971
2. On the limit analysis of stability of slopes;Chen;Soils and Foundations, The Japanese Society of Soil Mechanics and Foundation Engineering,1969
3. Soil mechanics and work-hardening theories of plasticity;Drucker;Transactions of the American Society of Mechanical Engineers,1957
4. Soil mechanics and plastic analysis or limit design;Drucker;Quarterly of Applied Mathematics,1952
5. Extended limit design theorems of continuous media;Drucker;Quarterly of Applied Mathematics,1952