%0 Journal Article %A A. V. Arguchintsev %A V. P. Poplevko %T Variation optimality condition of a boundary control in a composite model of linear differential equations of different types %J Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory %D 2023 %P 3-9 %V 224 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTO_2023_224_a0/ %G ru %F INTO_2023_224_a0