%0 Journal Article %A D. U. Umbetzhanov %T On correctly solvable boundary value problems for systems of equations with higher-order elliptic operators %J Differencialʹnye uravneniâ %D 1995 %P 2056-2062 %V 31 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1995_31_12_a13/ %G ru %F DE_1995_31_12_a13