1. N. N. Bogolyubov and B. I. Khatset, Dokl. Akad. Nauk SSSR,66, 321 (1949).
2. D. Ruelle, Statistical Mechanics, New York (1969).
3. T. L. Hill, Statistical Mechanics, McGraw-Hill, New York (1956).
4. I. M. Gelfand and G. E. Shilov, Generalized Functions, Vol. 2, Academic Press, New York (1964).