%0 Journal Article %A D. K. Gvazava %T On a modified formulation of the Goursat problem for a second-order quasilinear degenerate hyperbolic equation %J Differencialʹnye uravneniâ %D 1982 %P 285-290 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1982_18_2_a12/ %G ru %F DE_1982_18_2_a12