1. The finite element method in engineering science;Zienkiewiez,1971
2. Finite element analysis for wave propagation in elastic-plastic solids;Biffle,1973
3. Variational principles for linear elasto-dynamics;Gurtin;Arch. Rat. Mech. Anal.,1964
4. Finite element stress formulation for wave propagation;Verner,1971
5. Direct flexibility finite element elastoplastic analysis;Gallagher,1971