1. Equilibrium approach to the ultimate strength of a biaxially loaded beam-columns;Ringo,1964
2. Ultimate strength of steel columns under biaxially eccentric load;Sharma,1965
3. A general formulation of elastic-plastic analysis of space frameworks;Bruinette,1965
4. Capacity of wide flanges subjected to axial and biaxial bending;Pfrang,1966
5. Approximate yield surface equations;Morris;J. Engng Mech. Div., ASCE,1969