%0 Journal Article
%A V. M. Brodskii
%T On operator nodes and their characteristic functions
%J Doklady Akademii Nauk
%D 1971
%P 16-19
%V 198
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a2/
%G ru
%F DAN_1971_198_1_a2