@article{UZKU_1970_130_3_a1,
     author = {N. Z. Gabbasov},
     title = {On the characterization of events that are representable by finite probability automata},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {18--27},
     publisher = {mathdoc},
     volume = {130},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1970_130_3_a1/}
}