%0 Journal Article %A A. F. Filippov %T Conditions for the existence of solutions of multivalued differential equations %J Differencialʹnye uravneniâ %D 1977 %P 1070-1078 %V 13 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1977_13_6_a11/ %G ru %F DE_1977_13_6_a11