1. General theorems for elastic plastic solids;Koiter;Prog. Solid Mech.,1960
2. Theorie statisch unbestimmter systeme aus ideal plastischem baustoff;Melan;Sitz.Berl.Ak.Wiss,1936
3. Review of limit loads of structures containing defects;Miller;J. Mech. Phys. Solids,1988
4. Theory of Perfectly Plastic Solids;Prager,1968
5. Plane stress limit analysis by finite elements;Belytschko;J. Eng. Mech. Div.,1970