%0 Journal Article
%A Yu. F. Dolgii
%T The construction of the characteristic equation for a~system of differential equations with lag
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1977
%P 9-19
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1977_3_a1/
%G ru
%F IVM_1977_3_a1