1. Displacement and equilibrium models in the finite element method;de Veubeke,1965
2. Bending and stretching of plates — special models for upper and lower bounds;de Veubeke,1965
3. An equilibrium stress field model for finite element solutions of two dimensional elastostatic problems;Watwood;Int. J. Solids Struct.,1968
4. Variational methods in elasticity and plasticity;Washizu,1975
5. Formulations of finite element methods for solid continua;Pian,1971