%0 Journal Article %A K. S. Musabekov %T Existence of a solution to a system of equations in variations in an optimal control problem %J Sibirskij žurnal industrialʹnoj matematiki %D 2021 %P 48-66 %V 24 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJIM_2021_24_1_a3/ %G ru %F SJIM_2021_24_1_a3