%0 Journal Article %A Artino, Ralph A. %T Completely semielliptic boundary value problems %J Portugaliae mathematica %D 1993 %P 185-192 %V 50 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1993__50_2_115821/ %G en %F PORMA_1993__50_2_115821