%0 Journal Article %A S. S. Kharibegashvili %T On the statement of characteristic problems for symmetric first-order hyperbolic systems %J Differencialʹnye uravneniâ %D 2000 %P 1113-1122 %V 36 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2000_36_8_a13/ %G ru %F DE_2000_36_8_a13