1. [Be] S.N. Bernstein, Détermination d’une limite inférieure de la dispersion des sommes de grandeurs liées en chaine singuliére, Math. Sbornik 1 (1936), 29–38.
2. [Br] D. Brydges, A short course on cluster expansions, Critical Phenomena, Random Systems, Gauge Theory (Les Houches, 1984) (K. Ostewalder and R. Stora, eds.), North-Holland, Amsterdam-New York, 1986, pp. 129–183.
3. [Do56] R.L. Dobrushin, Central Limit Theorem for inhomogeneous Markov chains, Th. Prob. Appl. 1 (1956), 72–88, 365–425.
4. [Do65] R.L. Dobrushin, Existence of a phase transition in two and three dimensional Ising models, Th. Prob. Appl. 10 (1965), 193–213.
5. [Do70] R.L. Dobrushin, Description of a system of random variables by the help of conditional distributions, Th. Prob. Appl. 15 (1970), 469–497.