%0 Journal Article %A A. I. Yanushauskas %T Unconditional solvability of the oblique derivative problem %J Differencialʹnye uravneniâ %D 1967 %P 89-96 %V 3 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1967_3_1_a8/ %G ru %F DE_1967_3_1_a8