1. Approximation des problèmes aux limites non homogènes et régularité de la convergence;Aubin;Calcolo,1969
2. The finite element method with penalty;Babuška;Math. Comp.,1973
3. The Finite Element Method with Lagrangian Multipliers;Babuška,1972
4. Simplified proofs of error estimates for the least squares method for Dirichlet's problem;Baker;Math. Comp.,1973
5. Piecewise Hermite interpolation in one and two variables with applications to partial differential equations;Birkhoff;Numer. Math.,1968