%0 Journal Article %A R. Verfürth %T A posteriori error estimators for the Stokes equations II non-conforming discretizations. %J Numerische Mathematik %D 1991 %P 235-250 %V 60 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133593/ %F NUMA_1991__60_4_133593