@article{DAN_1981_256_6_a10,
     author = {R. V. Freivald},
     title = {Two-way finite probabilistic automata and {Turing} machines with bounded tape complexity},
     journal = {Doklady Akademii Nauk},
     pages = {1326--1329},
     publisher = {mathdoc},
     volume = {256},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_256_6_a10/}
}