%0 Journal Article
%A J.T. Marti
%T Operational Calculus for Two Commuting Closed Operators.
%J Commentarii mathematici Helvetici
%D 1968
%P 87-97
%V 43
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1968__43_139354/
%F CMH_1968__43_139354