%0 Journal Article %A V. V. Kucherenko %A Yu. V. Osipov %T The Cauchy problem for nonstrictly hyperbolic equations %J Sbornik. Mathematics %D 1984 %P 81-109 %V 48 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1984_48_1_a4/ %G en %F SM_1984_48_1_a4