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2. J. Douglas, Jr., T. Dupont, and M. F. Wheeler, A Galerkin procedure for approximating the flux on the boundary for elliptic and parabolic boundary value problems, MRC report #1381 and to appear.
3. T. Dupont, Some L2 error estimates for parabolic Galerkin methods, The Mathematical Foundations of the Finite Element Method with Applications to Partial Differential Equations, A. K. Aziz (ed.), Academic Press, New York, 1972.
4. V. Thomée and L. Wahlbin, to appear.
5. M. F. Wheeler, A Galerkin procedure for estimating the flux for two point boundary value problems, to appear in SIAM J. Numer. Anal.