@article{TDM_2008_11_2_a4,
     author = {V. L. Kurakin},
     title = {Free shift {registers.~III}},
     journal = {Trudy po diskretnoj matematike},
     pages = {63--85},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2008_11_2_a4/}
}