1. Arveson, W. B.: On groups of automorphisms of operator algebras, J. Funct. Anal.15, 217 (1974)
2. Boas, R. P.: Entire functions. New York: Academic Press Inc., 1954
3. Bochner, S., Martin, W. T.: Several complex variables. Princeton, NJ: Princeton University Press 1948
4. Borchers, H.-J.: Energy and momentum as observables in quantum field theory. Commun. Math. Phys.2, 49 (1966)
5. Borchers, H.-J.: On groups of automorphisms with semi-bounded spectrum, In: Systemes a un Nombre Infini de Degrès de Liberté, Gif-sur-Yvette 1969 Editons du C.N.R.S