@article{TDM_2002_5_a0,
     author = {A. V. Babash},
     title = {Free of error reproduction automata mappings of periodic sequences},
     journal = {Trudy po diskretnoj matematike},
     pages = {7--20},
     year = {2002},
     volume = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2002_5_a0/}
}