%0 Journal Article
%A A. M. Kagan
%T Sufficient systems
%J Informatics and Automation
%D 1965
%P 17-23
%V 79
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1965_79_a3/
%G ru
%F TRSPY_1965_79_a3