@article{PDMA_2014_7_a13,
     author = {L. A. Sholomov},
     title = {On a~comparison of underdetermined alphabets},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {34--36},
     year = {2014},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2014_7_a13/}
}