1. Behavior of the error of the approximate solutions of boundary value problems for linear elliptic operators by Galerkin's and finite difference methods;Aubin;Ann. Scuola Norm. Sup. Pisa Cl. Sci., Series 3,1967
2. Error bounds for finite element method;Babuška;Numer. Math.,1971
3. Survey lectures on the mathematical foundations of the finite element method;Babuška,1973
4. On the angle condition in the finite element method;Babuška;SIAM J. Numer. Anal.,1976
5. Error estimates for adaptive finite element computations;Babuška;SIAM J. Numer. Anal.,1978