%0 Journal Article %A Gatica, Gabriel N. %T A note on the efficiency of residual-based a posteriori error estimators for some mixed finite element methods. %J Electronic transactions on numerical analysis %D 2004 %P 218-233 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2004__17__a0/ %G en %F ETNA_2004__17__a0