1. Bramble, J. H.,Error Estimates for Difference Methods in Forced Vibration Problems, SIAM J. Numer. Anal.3, 1–12 (1966).
2. Bramble, J. H., andHubbard, B. E.,On the Formulation of Finite Difference Analogues of the Dirichlet Problem for Poisson's Equation, Numer. Math.4, 313–327 (1962).
3. Bramble, J. H., andHubbard, B. E.,A Priori Bounds on the Discretization Error in the Numerical Solution of the Dirichlet Problem, Contributions to Differential Equations, Vol. II (John Wiley & Sons, Inc., New York, 1963), pp. 229–252.
4. Bramble, J. H. andHubbard, B. E.,A Theorem on Error Estimation for Finite Difference Analogues of the Dirichlet Problem for Elliptic Equations, Contributions to Differential Equations, Vol. II (John Wiley & Sons, Inc., New York 1963), pp. 319–340.
5. Bramble, J. H. andHubbard, B. E.,On a Finite Difference Analogue of an Elliptic Boundary Problem which is Neither Diagonally Dominant Nor of Non-Negative Type, J. Math. and Phys.43, 117–132 (1964).