%0 Journal Article %A M. S. Nikol'skii %T Well-posedness of an optimal control problem for a~linear control system with integral quadratic performance index %J Informatics and Automation %D 1984 %P 177-185 %V 166 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1984_166_a12/ %G ru %F TRSPY_1984_166_a12