%0 Journal Article %A V. V. Anisimov %T Limit theorems for semi-Markov processes with a countable set of states %J Doklady Akademii Nauk %D 1970 %P 503-505 %V 193 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_193_3_a0/ %G ru %F DAN_1970_193_3_a0