@article{DAN_1964_157_3_a13,
     author = {R. R. Varshamov},
     title = {On some singularities of linear codes which correct non-symmetric errors},
     journal = {Doklady Akademii Nauk},
     pages = {546--548},
     publisher = {mathdoc},
     volume = {157},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_3_a13/}
}