%0 Journal Article %A V. M. Govorov %T The uniqueness of the classical (in the sense of V.\,A.~Il'in) solution of the mixed problem for a hyperbolic equation with time-dependent coefficients %J Differencialʹnye uravneniâ %D 1976 %P 1804-1814 %V 12 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_10_a7/ %G ru %F DE_1976_12_10_a7