%0 Journal Article
%A Kirchev, K.
%A Borisova, G.
%T Commuting Nonselfadjoint Operators and their Characteristic Operator-Functions
%J Serdica Mathematical Journal
%D 1997
%P 313-334
%V 23
%N 3-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SMJ2_1997_23_3-4_a8/
%G en
%F SMJ2_1997_23_3-4_a8