%0 Journal Article %A S. A. Vakhrameev %T Bang-bang theorems and related questions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1998 %P 49-112 %V 220 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1998_220_a5/ %G ru %F TM_1998_220_a5