@article{DM_2015_27_2_a0,
     author = {D. E. Alexandrov},
     title = {Cardinality estimates for some classes of regular languages},
     journal = {Diskretnaya Matematika},
     pages = {3--21},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2015_27_2_a0/}
}