1. B. Widom in “Fundamental Problems in Statistical. Mechanics” vol. III, Ed. E. V. G. Cohen (North Holland, 1975) pp. 1–45.
2. P. Pfeuty and G. Toulouse, “Introduction to Renormalization Groups and Critical Phenomena” (Wiley, 1977).
3. M. E. Fisher, Rev. Mod. Phys. 46, 597–616 (1974).
4. D. J. Wallace and R. K. P. Zia, Repts. Prog. Phys. 41, 1–85 (1978).
5. A. Z. Patashinskii and V. L. Pokrovskii, “Fluctuation Theory of Phase Transitions” (Pergamon Press, 1979).