%0 Journal Article %A Mandl, Petr %T A connection between controlled Markov chains and martingales %J Kybernetika %D 1973 %P 237-241 %V 9 %N 4 %U http://geodesic.mathdoc.fr/item/KYB_1973_9_4_a1/ %G en %F KYB_1973_9_4_a1