@article{DA_1999_6_4_a3,
     author = {S. A. Malyugin},
     title = {On a~lower bound for the number of perfect binary codes},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {44--48},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_1999_6_4_a3/}
}