%0 Journal Article
%A V. P. Kirlitsa
%T Invariance of a certain linear system with lag
%J Differencialʹnye uravneniâ
%D 1973
%P 955-957
%V 9
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_5_a21/
%G ru
%F DE_1973_9_5_a21