%0 Journal Article
%A I. Istratescu
%T On some classes of Operators on Hilbert spaces
%J Ευκλείδης Γ

%D 1987
%P 15-18
%V 14
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EUG_1987__14_a2/
%G gr
%F EUG_1987__14_a2