1. For a review: K.G. Wilson and J. Kogut, The renormalization group and the ϵ-expansion, Phys. Reports, to be published.
2. Feynman-Graph Expansion for Critical Exponents
3. B. Schroer, Freie Universität Berlin, preprint
4. K. Mitter, Maryland University, preprint
5. E. Brezin, J.C. Le Guillou and J. Zinn-Justin, Saclay preprint.