1. Wilson, K.G., Kogut, J.: The renormalization group and the ε-expansion, Phys. Rep.12C, 75–199 (1974)
2. Sinai, Ja. G.: Theory of phase transitions. Rigorous results (in Russian). Moscow: Nauka 1980
3. Bleher, P.M.: ε-Expansion for scaling invariant random fields. In: Multicomponent random systems (in Russian) (eds. R.L. Dobrushin, Ja. G.F. Sinai). Moscow: Nauka 1978
4. Ma, S.K.: Introduction to the renormalization group. Rev. Mod. Phys.45, 589–614 (1973)
5. Sinai, Ja. G.: Scaling invariant distributions of probabilities (in Russian). Teor. Veroyatn. Ee. Primen.21, 63–80 (1976)