%0 Journal Article %A A. I. Yanushauskas %T Some cases of overdetermination of a problem on the oblique derivative %J Differencialʹnye uravneniâ %D 1968 %P 102-109 %V 4 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_1_a8/ %G ru %F DE_1968_4_1_a8