%0 Journal Article %A S. A. Vakhrameev %T An existence theorem for a~non-linear time-optimal problem in a~class of bang-bang controls with finitely many switchings %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1996 %P 353-354 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1996_51_2_a20/ %G en %F RM_1996_51_2_a20