%0 Journal Article %A P. G. Surkov %T On an optimal control problem for a nonlinear system %J Trudy Instituta matematiki i mehaniki %D 2013 %P 241-249 %V 19 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_2013_19_4_a24/ %G ru %F TIMM_2013_19_4_a24