@article{DM_2003_15_3_a3,
     author = {A. V. Babash},
     title = {On the properties of a special composition of automata},
     journal = {Diskretnaya Matematika},
     pages = {66--75},
     year = {2003},
     volume = {15},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2003_15_3_a3/}
}