@article{DAN_1970_193_3_a0,
     author = {V. V. Anisimov},
     title = {Limit theorems for {semi-Markov} processes with a countable set of states},
     journal = {Doklady Akademii Nauk},
     pages = {503--505},
     publisher = {mathdoc},
     volume = {193},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_193_3_a0/}
}