@article{TDM_2006_9_a5,
     author = {V. L. Kurakin},
     title = {Free shift {registers.~I}},
     journal = {Trudy po diskretnoj matematike},
     pages = {77--109},
     publisher = {mathdoc},
     volume = {9},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2006_9_a5/}
}