%0 Journal Article %A V. V. Tikhomirov %T Optimal control of nonlocal problems for distributed systems %J Differencialʹnye uravneniâ %D 1998 %P 709-718 %V 34 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1998_34_5_a11/ %G ru %F DE_1998_34_5_a11