%0 Journal Article
%A V. V. Filippov
%T A mixture of the Leray--Schauder and the Poincar\'e--Andronov methods in the problem of periodic solutions of ordinary differential equations
%J Differencialʹnye uravneniâ
%D 1999
%P 1709-1711
%V 35
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1999_35_12_a14/
%G ru
%F DE_1999_35_12_a14