%0 Journal Article %A V. M. Marchenko %T Hybrid integral-differential-difference dynamic systems in symmetric form with memory loss %J Trudy Instituta matematiki %D 2021 %P 113-125 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMB_2021_29_1_a10/ %G ru %F TIMB_2021_29_1_a10