@article{DA_2000_7_4_a7,
     author = {D. S. Krotov},
     title = {$Z_4$-linear perfect codes},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {78--90},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2000_7_4_a7/}
}