1. G. A. Battle and P. Federbush, A phase cell cluster expansion for Euclidean field theories, Ann. Phys. 142, 95 (1982); A note on cluster expansions, tree graph identities, extra 1/N! factors!!! Lett. Math. Phys. 8, 55 (1984).
2. G. Battle, A new combinatoric estimate for cluster expansions, Comm. Math. Phys. 94, 133 (1984).
3. D. Brydges, A short course on cluster expansions, in Critical phenomena, random systems, gauge theories, Les Houches session XLHI, 1984, Elsevier Science Publishers, 1986.
4. D. Brydges, Functional integrals and their applications, “Cours de Troisième Cycle de la Physique en Suisse Romande” taken by R. Fernandez, Université de Lausanne or University of Virginia preprint, (1992).
5. D. Brydges and P. Federbush, A new form of the Mayer expansion in classical statistical mechanics, Journ. Math. Phys. 19, 2064 (1978).