%0 Journal Article
%A G. L. Gasilov
%T The characteristic equation of a~system of linear differential equations with periodic coefficients and lags
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1972
%P 60-66
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1972_4_a6/
%G ru
%F IVM_1972_4_a6