1. See, for instance,J. Glimm andA. Jaffe:Quantum Physics, 2nd edition (Springer Berlin, 1986) and references therein.
2. K. Osterwalder andR. Schrader:Helv. Phys. Acta.,46, 277 (1973). For the recent attempt toward a probabilistic interpretation of Berezin integral, see for instance:J. Kupsch:Functional Integration for Euclidean Dirac fields (Universität Keiserslautern, 1987), preprint.
3. R. P. Feynman andA. R. Hibbs:Quantum Mechanics and Path Integrals (McGraw-Hill, New York, N. Y., 1965).
4. G. Leibbrandt:Rev. Mod. Phys.,59, 1067 (1987).
5. G. C. Rossi andM. Testa:Nucl. Phys. B,163, 109 (1980);176, 477 (1980).