@article{M2AN_1985__19_3_397_0, author = {J. Douglas, Jr. and Milner, F. A.}, title = {Interior and superconvergence estimates for mixed methods for second order elliptic problems}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique}, volume = {19}, year = {1985}, pages = {397-428}, mrnumber = {807324}, zbl = {0613.65110}, language = {en}, url = {http://dml.mathdoc.fr/item/M2AN_1985__19_3_397_0} }
J. Douglas, Jr.; Milner, F. A. Interior and superconvergence estimates for mixed methods for second order elliptic problems. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 19 (1985) pp. 397-428. http://gdmltest.u-ga.fr/item/M2AN_1985__19_3_397_0/
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