@article{DM_1997_9_3_a0,
     author = {A. V. Babash and M. M. Glukhov and G. P. Shankin},
     title = {On transformations of a set of words in a finite alphabet that do not propagate distortions},
     journal = {Diskretnaya Matematika},
     pages = {3--19},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1997_9_3_a0/}
}