%0 Journal Article %A R.D. Lazarov %A A.I. Pehlivanov %A ... %T Superconvergence analysis of approximate boundary-flux calculations. %J Numerische Mathematik %D 1992 %P 483-502 %V 63 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1992__63_1_133691/ %F NUMA_1992__63_1_133691