@article{PDM_2014_3_a3,
     author = {L. A. Sholomov},
     title = {On the concept of underdetermined alphabets of equal strength},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {40--57},
     publisher = {mathdoc},
     number = {3},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2014_3_a3/}
}