1. D. J. Amit,Field Theory, the Renormalization Group, and Critical Phenomena, 2nd ed. (World Scientific, Singapore, 1984), Chapters 5 and 6.
2. P. Ramond,Field Theory: A Modern Primer (Benjamin, Reading, Massachusetts, 1981), Chapter 3.
3. J. Zinn-Justin,Quantum Field Theory and Critical Phenomena (Clarendon Press, Oxford, 1989), Chapters 5, 33?40).
4. A. Z. Patashinskii and V. L. Pokrovskii,Fluctuation Theory of Phase Transitions (Pergamon Press, New York, 1979), Appendix.
5. D. Jasnow, inPhase Transitions and Critical Phenomena, Vol. 10, C. Domb and J. L. Lebowitz, eds. (Academic Press, New York, 1986), p. 269.