%0 Journal Article
%A K. S. Matviychuk
%T The mathematical description of quantum systems by the method of reduced density matrices of the canonical ensemble
%J Doklady Akademii Nauk
%D 1976
%P 318-320
%V 227
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1976_227_2_a15/
%G ru
%F DAN_1976_227_2_a15