@article{FPM_2009_15_3_a4,
     author = {D. N. Babin},
     title = {On the classification of bases in $P_k$ according to the decidability of the completeness problem for automata},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {33--47},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2009_15_3_a4/}
}