%0 Journal Article %A Arnold, D. N. %A Brezzi, F. %T Mixed and nonconforming finite element methods : implementation, postprocessing and error estimates %J ESAIM: Mathematical Modelling and Numerical Analysis %D 1985 %P 7-32 %V 19 %N 1 %I AFCET - Gauthier-Villars %C Paris %U http://geodesic.mathdoc.fr/item/M2AN_1985__19_1_7_0/ %G en %F M2AN_1985__19_1_7_0