%0 Journal Article
%A A. S. Holevo
%A M. E. Shirokov
%T The additivity problem for constrained quantum channels
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 2004
%P 385-387
%V 59
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_2004_59_2_a14/
%G en
%F RM_2004_59_2_a14