%0 Journal Article %A L. N. Eshukov %T Conditions for the existence of a solution of a certain optimal control problem %J Doklady Akademii Nauk %D 1968 %P 29-32 %V 183 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_183_1_a6/ %G ru %F DAN_1968_183_1_a6