@article{DAN_1966_166_5_a14,
     author = {V. S. Grinberg},
     title = {Some new estimates in the theory of finite automata},
     journal = {Doklady Akademii Nauk},
     pages = {1066--1068},
     publisher = {mathdoc},
     volume = {166},
     number = {5},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_5_a14/}
}