%0 Journal Article
%A O. S. Kostromina
%T On two-frequency quasi-periodic perturbations of systems close to two-dimensional Hamiltonian ones with a double limit cycle
%J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki
%D 2021
%P 35-49
%V 31
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VUU_2021_31_1_a2/
%G en
%F VUU_2021_31_1_a2