1. D. Ruelle, Statistical Mechanics. Rigorous Results, New York-Amsterdam (1969).
2. R. L. Dobrushin, Funktsional'. Analiz i Ego Prilozhen.,2, 44 (1968).
3. R. L. Dobrushin, Funktsional'. Analiz i Ego Prilozhen.,2, 31 (1968).
4. O. E. Lanford III and D. Ruelle, Commun. Math. Phys.,13, 194 (1968).
5. I. A. Ibragimov and Yu. L. Rozanov, Gaussian Random Processes [in Russian], Nauka (1970).