%0 Journal Article %A Kopáček, Jiří %T On $L_p$-estimates for the Cauchy problem for hyperbolic systems (Preliminary communication) %J Commentationes Mathematicae Universitatis Carolinae %D 1969 %P 237-239 %V 10 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1969__10_2_a7/ %G en %F CMUC_1969__10_2_a7