TY - JOUR AU - A. V. Arguchintsev AU - V. P. Poplevko TI - Variation optimality condition of a boundary control in a composite model of linear differential equations of different types JO - Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory PY - 2023 SP - 3 EP - 9 VL - 224 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/INTO_2023_224_a0/ LA - ru ID - INTO_2023_224_a0 ER -