%0 Journal Article %A A. V. Arguchintsev %A V. P. Poplevko %T Variational optimality condition in a control problem of a linear first-order hyperbolic system with boundary delay %J Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory %D 2022 %P 3-9 %V 212 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTO_2022_212_a0/ %G ru %F INTO_2022_212_a0