%0 Journal Article %A V. P. Rudakov %T A generalization of the Eshukov boundary value problem %J Differencialʹnye uravneniâ %D 1991 %P 2177-2178 %V 27 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1991_27_12_a25/ %G ru %F DE_1991_27_12_a25