@article{DM_1989_1_4_a6,
     author = {Ya. Ya. Kanep},
     title = {Stochasticity of languages that can be recognized by two-sided finite probabilistic automata},
     journal = {Diskretnaya Matematika},
     pages = {63--77},
     year = {1989},
     volume = {1},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1989_1_4_a6/}
}