@article{DAN_1963_149_5_a4,
     author = {G. M. Korpelevich},
     title = {On the relationship of the concepts of solvability and countability for finite automata},
     journal = {Doklady Akademii Nauk},
     pages = {1023--1025},
     publisher = {mathdoc},
     volume = {149},
     number = {5},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_5_a4/}
}