%0 Journal Article %A T. I. Zelenyak %T The behavior at infinity of solutions of a certain mixed problem %J Differencialʹnye uravneniâ %D 1969 %P 1676-1689 %V 5 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_9_a13/ %G ru %F DE_1969_5_9_a13