%0 Journal Article %A A. V. Zhiber %T Quasilinear hyperbolic equations with an infinite-dimensional symmetry algebra %J Izvestiya. Mathematics %D 1995 %P 33-54 %V 45 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1995_45_1_a1/ %G en %F IM2_1995_45_1_a1