%0 Journal Article
%A V. P. Prokop'ev
%T Stability in the critical case of $r$ null-roots for a~system with aftereffect
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1967
%P 88-94
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1967_1_a13/
%G ru
%F IVM_1967_1_a13