%0 Journal Article
%A V. I. Voilokov
%T Periodic solutions of non-linear oscillatory systems with one degree of freedom
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1964
%P 19-27
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1964_1_a3/
%G ru
%F IVM_1964_1_a3