%0 Journal Article %A Rzepecki, Bogdan %T Note on hyperbolic partial differential equations %J Mathematica slovaca %D 1981 %P 243-250 %V 31 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1981__31_3_a2/ %G en %F MASLO_1981__31_3_a2