%0 Journal Article %A F. T. Baranovskii %T A mixed problem for a second order degenerate hyperbolic equation with two variables %J Differencialʹnye uravneniâ %D 1978 %P 1424-1438 %V 14 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1978_14_8_a7/ %G ru %F DE_1978_14_8_a7