%0 Journal Article %A G. I. Èskin %T The Cauchy problem for hyperbolic systems in convolutions %J Sbornik. Mathematics %D 1967 %P 243-277 %V 3 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1967_3_2_a6/ %G en %F SM_1967_3_2_a6