%0 Journal Article %A S. I. Pokhozhaev %T On Hyperbolic Systems of Conservation Laws %J Differencialʹnye uravneniâ %D 2003 %P 663-673 %V 39 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2003_39_5_a9/ %G ru %F DE_2003_39_5_a9