%0 Journal Article %A T. Sh. Kal'menov %T A criterion for the uniqueness of the solution of the Darboux problem for a certain degenerate hyperbolic equation %J Differencialʹnye uravneniâ %D 1971 %P 178-181 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_1_a19/ %G ru %F DE_1971_7_1_a19