%0 Journal Article %A Yu. I. Brodskii %T Linear time-optimality problems with mixed constraints %J Differencialʹnye uravneniâ %D 1976 %P 1541-1551 %V 12 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_9_a1/ %G ru %F DE_1976_12_9_a1