%0 Journal Article %A A. V. Arguchintsev %T The variational optimality condition in the problem of minimizing the finite state norm by a composite system of hyperbolic and ordinary differential equations %J Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ %D 2023 %P 540-548 %V 19 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VSPUI_2023_19_4_a9/ %G ru %F VSPUI_2023_19_4_a9