%0 Journal Article
%A M. E. Shirokov
%A A. V. Bulinski
%T Lower estimates for distances from a given quantum channel to  certain classes of quantum channels
%J Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory
%D 2017
%P 125-131
%V 138
%I mathdoc
%U http://geodesic.mathdoc.fr/item/INTO_2017_138_a8/
%G ru
%F INTO_2017_138_a8