%0 Journal Article %A R. R. Mukhin %T On the Poincar\'e--Birkhoff theorem as the important result of the theory of dynamical systems %J Čebyševskij sbornik %D 2022 %P 209-222 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CHEB_2022_23_1_a15/ %G ru %F CHEB_2022_23_1_a15