%0 Journal Article %T To the memory of Sergey P. Kuznetsov %J Izvestiya VUZ. Applied Nonlinear Dynamics %D 2020 %P 223-224 %V 28 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVP_2020_28_2_a8/ %G ru %F IVP_2020_28_2_a8