@article{DAN_1966_168_3_a2,
     author = {N. V. Beljakin},
     title = {Turing machines working in the plane},
     journal = {Doklady Akademii Nauk},
     pages = {502--503},
     publisher = {mathdoc},
     volume = {168},
     number = {3},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_168_3_a2/}
}