%0 Journal Article
%A D. V. Treschev
%T On Isochronicity
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 2023
%P 206-232
%V 322
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_2023_322_a16/
%G ru
%F TM_2023_322_a16