%0 Journal Article %A I. V. Evstigneev %T The principle of optimality and the equilibrium theorem for %J Doklady Akademii Nauk %D 1984 %P 782-786 %V 274 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1984_274_4_a3/ %G ru %F DAN_1984_274_4_a3