%0 Journal Article %A A. Ya. Lepin %T A priori boundedness of derivatives for a system of differential inequalities %J Differencialʹnye uravneniâ %D 1989 %P 1129-1135 %V 25 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1989_25_7_a3/ %G ru %F DE_1989_25_7_a3