%0 Journal Article %A A. K. Demenchuk %T On control problem of asynchronous spectrum of linear system with singular upper left diagonal block of coefficient matrix %J Trudy Instituta matematiki %D 2023 %P 44-49 %V 31 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMB_2023_31_1_a5/ %G ru %F TIMB_2023_31_1_a5