Gibbs Random Fields: Cluster Expansions
V.A. Malyshev
The result presented here is due to E. N. Petrova [54], see also the paper [42] by
V. A. Malyshev and E. N. Petrova. A similar model was discussed in [11] by F. F.
Galeb. $2. The presented result is a case of a result of G. Zoladek [25].