@article{DA_1998_5_4_a3,
     author = {A. Yu. Vasil'eva},
     title = {On the distance between perfect binary codes},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {25--29},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_1998_5_4_a3/}
}