%0 Journal Article
%A N. DUNFORD
%T A Spectral Theory for Certain Operators on a Direct Sum of Hilbert Spaces.
%J Mathematische Annalen
%D 1965
%P 294-330
%V 162
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1965__162_161343/
%F MAN_1965__162_161343