%0 Journal Article %A K. B. Mansimov %T Some necessary conditions for optimality for a class of systems with distributed parameters %J Differencialʹnye uravneniâ %D 1987 %P 2164-2167 %V 23 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1987_23_12_a22/ %G ru %F DE_1987_23_12_a22