%0 Journal Article
%A Shmuel Kantorovitz
%T Characterization of unbounded spectral operators with spectrum in a half-line.
%J Commentarii mathematici Helvetici
%D 1981
%P 163-178
%V 56
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1981__56_139865/
%F CMH_1981__56_139865