%0 Journal Article %A B. S. Kalitin %T On some problems of instability in semi-dynamical systems %J Journal of the Belarusian State University. Mathematics and Informatics %D 2021 %P 39-45 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/BGUMI_2021_1_a2/ %G ru %F BGUMI_2021_1_a2