%0 Journal Article
%A A. Turaev
%T Some criteria for the existence of limit cycles of a~differential equation
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1970
%P 92-95
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1970_5_a14/
%G ru
%F IVM_1970_5_a14