%0 Journal Article %A Reinhard Farwig %T A variational approach in weighted Sobolev spaces to the operator - ... + .../... X1 in exterior domains of IR3. %J Mathematische Zeitschrift %D 1992 %P 449-464 %V 210 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174412/ %F MZ_1992__210_1_174412