1. An Analysis of the Finite Element Method;Strang,1973
2. Variational Methods in Mathematical Physics;Mikhlin,1964
3. The Finite Element Method and Boundary Solution Procedures as General Approximation Methods for Field Problems;Zienkiewicz,1975
4. Complementary Variational Principles;Arthurs,1970
5. A Rayleigh-Ritz-Galerkin Method for the Solution of One and Two Dimensional Boundary Value Problems;Yates,1975