1. Jaffe, A. M.: Dynamics of a cut-off λϕ4 theory. Princeton Thesis 1965 and Amer. Math. Soc. Memoir to appear.
2. Lanford, O. E.: Construction of quantum fields interacting by a cut-off Yukawa coupling. Princeton Thesis 1966 and Amer. Math. Soc. Memoir to appear.
3. Kato, T.: Perturbation theory for linear operators. Berlin-Heidelberg-New York: Springer 1966.
4. Cannon, J.: Princeton Thesis 1967. To appear.
5. See theorems 8.3 and 8.4 proved by Lanford, O., A. Jaffe, and S. Doplicher respectively quoted in Cargèse lectures 1964 edited by M. Levy Gordon and Breach N. Y. 1967. See also I. Segal: Non-linear functions of stochastic processes I. Jour. Funct. Anal. to appear.