1. On the general notion of maximal correlation;Csáki;Magyar. Tud. Akad. Mat. Kutató Int. Közl.,1963
2. Central limit theorems for non-stationary Markov chains I, II;Dobrushin;Theory Probab. Appl.,1956
3. Examples of mixing sequences;Kesten;Duke Math. J.,1976
4. Peligrad, M., 2011. Central limit theorem for triangular arrays of non-homogeneous Markov chains. Probab. Theory Related Fields (Published online June 3, 2011: doi:10.1007/s00440-011-0371-6).