%0 Journal Article
%A A. V. Chechkin
%T Ultraoperators in the theory of information systems
%J Doklady Akademii Nauk
%D 1982
%P 302-305
%V 263
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1982_263_2_a11/
%G ru
%F DAN_1982_263_2_a11