@article{ZVMMF_1966_6_4_a10,
     author = {V. A. Vasil'ev},
     title = {The structure of constructions in formal languages},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {727--732},
     year = {1966},
     volume = {6},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1966_6_4_a10/}
}