1. Derivation of element stiffness matrices by assumed stress distributions;Pian;AIAA Jnl,1964
2. Element Stiffness Matrices for Boundary Compatibility and for Prescribed Boundary Stresses;Pian,1965
3. The finite element method for flexure of slabs when stress distributions are assumed;Severn,1966
4. Vibration of plate and shell structures using triangular finite elements;Dungar;J. Strain Analysis,1967
5. A variational principle and the convergence of a finite-element method based on assumed stress distribution;Tong;Int. J. Solids Struct,1969