1. Sur le theoreme limite due calcul des probabilites;Bernstein;Math. Ann.,1922
2. Determination d'une limite interienre de la dispersion des sommes de grandeurs liees en chain singuliere;Bernstein;Mat.Sb.,1936
3. Central limit theorem for nonstationary Markov chains;Dobrushin;Theory Probab. Appl.,1956
4. Central limit theorem for nonstationary Markov chains;Dobrushin;Theory Probab. Appl.,1956
5. Stochastic Processes;Doob,1953