KONDRATIEV, A. Yu.; REBENKO, A. L. Some remarks about cluster expansion for unbounded continuous spin systems in quantum statistical mechanics. Methods of Functional Analysis and Topology, [S. l.], v. 2, n. 2, p. 61–69, 1996. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/13. Acesso em: 19 dec. 2025.