%0 Journal Article %A V. V. Bobkov %A V. I. Krylov %T The method of integral relations for equations and systems of hyperbolic type %J Differencialʹnye uravneniâ %D 1965 %P 230-243 %V 1 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1965_1_2_a13/ %G ru %F DE_1965_1_2_a13