%0 Journal Article %A Nguyen Thya Hop %T A generalized Green's matrix for a problem with a directional derivative for a system of elliptic type in several variables %J Differencialʹnye uravneniâ %D 1966 %P 574-581 %V 2 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1966_2_4_a12/ %G ru %F DE_1966_2_4_a12