@article{IVM_1978_1_a14,
     author = {V. I. Serdobol'skii and V. G. Pronin},
     title = {Properties of probabilistic languages},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {117--122},
     publisher = {mathdoc},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1978_1_a14/}
}