%0 Journal Article %A Mark Ainsworth %A Alan Craig %T A posteriori error estimators in the finite element method. %J Numerische Mathematik %D 1991 %P 429-464 %V 60 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133600/ %F NUMA_1991__60_4_133600