%0 Journal Article
%A Yu. G. Borisovich
%T On the method of Poincar\'e and Andronov in the problem of periodic solutions of differential equations with lag
%J Doklady Akademii Nauk
%D 1963
%P 779-782
%V 152
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_152_4_a1/
%G ru
%F DAN_1963_152_4_a1