%0 Journal Article %A M. I. Vishik %T On general boundary problems for elliptic differential equations %J Trudy Moskovskogo matematičeskogo obŝestva %D 1952 %P 187-246 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1952_1_a4/ %G ru %F MMO_1952_1_a4