%0 Journal Article
%A V. V. Yevstafyeva
%T Existence of~$T/k$-Periodic Solutions of a Nonlinear Nonautonomous System Whose Matrix Has a Multiple Eigenvalue
%J Matematičeskie zametki
%D 2021
%P 529-543
%V 109
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_2021_109_4_a3/
%G ru
%F MZM_2021_109_4_a3