1. S. Albeverio, J. Fendstad, R. HØegh-Krohn, and T. LindstrØm,Nonstandard Methods in Stochastic Analysis and Mathematical Physics (Academic Press, Orlando, 1986).
2. J. M. Cook, “The mathematics of second quantization.”Trans. Am. Math. Soc. 74, 222–245 (1953).
3. M. Davies,Applied Nonstandard Analysis (Wiley, New York, 1977).
4. N. Dunford and J. Schwartz,Linear Operators, Vol. I (Wiley, New York, 1958).
5. M. O. Farrukh, “Applications of nonstandard analysis to quantum mechanics,”J. Math. Phys. 18, 177–200 (1975).