%0 Journal Article
%A G. M. Ulanov
%T Invariance up to~$\varepsilon$ in linear combined automatically controlled systems
%J Doklady Akademii Nauk
%D 1957
%P 253-256
%V 112
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_112_2_a19/
%G ru
%F DAN_1957_112_2_a19