@article{CMUC_1969_10_2_a7,
     author = {Kop\'a\v{c}ek, Ji\v{r}{\'\i}},
     title = {On $L_p$-estimates for the {Cauchy} problem for hyperbolic systems {(Preliminary} communication)},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {237--239},
     year = {1969},
     volume = {10},
     number = {2},
     mrnumber = {0248451},
     zbl = {0176.40303},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1969_10_2_a7/}
}