%0 Journal Article %A N. M. Mitrofanova %T Families of transition densities in Markov chains which allow non-trivial sufficient statistics %J Informatics and Automation %D 1968 %P 181-188 %V 104 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1968_104_a4/ %G ru %F TRSPY_1968_104_a4