%0 Journal Article %A M. M. Khapaev %T Singular differential equations in control and minimization problems %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1995 %P 411-418 %V 211 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1995_211_a28/ %G ru %F TM_1995_211_a28