%0 Journal Article %A E. A. Fadeeva %T First order hyperbolic equations with constant operator coefficients %J Sbornik. Mathematics %D 1974 %P 257-270 %V 22 %N 2 %U http://geodesic.mathdoc.fr/item/SM_1974_22_2_a5/ %G en %F SM_1974_22_2_a5