1. “Finite element method for domains with corners,”;Babuška;Computing,1970
2. “The direct solution of the discrete Poisson equation on a rectangle,”;Dorr;SIAM Review,1970
3. Eisenstat, S.C., “On the rate of convergence of the Bergman-Vekua method for the numerical solution of elliptic boundary value problems,” Doctoral thesis, Stanford University, 1972.
4. “Higher-order Rayleigh-Ritz approximations,”;Fix;J. Math. Mech.,1969
5. “Perturbation of matrices in the numerical solution of differential equations: I. Quadrature errors,”;Fix,1972