%0 Journal Article %A V. N. Ushakov %A V. I. Ukhobotov %A A. V. Ushakov %A G. V. Parshikov %T On solving approach problems for control systems %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2015 %P 276-291 %V 291 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2015_291_a20/ %G ru %F TM_2015_291_a20