%0 Journal Article %A N. J. Yurchuk %T A partially characteristic boundary value problem for a certain form of partial differential equations.~II %J Differencialʹnye uravneniâ %D 1969 %P 531-542 %V 5 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_3_a12/ %G ru %F DE_1969_5_3_a12