%0 Journal Article
%A Ya. V. Bykov
%A K. A. Kiriy
%T Periodic oscillations with large amplitude
%J Differencialʹnye uravneniâ
%D 1975
%P 604-610
%V 11
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1975_11_4_a1/
%G ru
%F DE_1975_11_4_a1