%0 Journal Article
%A E. I. Bravyi
%T On positive periodic solutions of first order functional differential equations
%J Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta
%D 2015
%P 21-28
%V 46
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IIMI_2015_46_2_a2/
%G ru
%F IIMI_2015_46_2_a2