@article{DAN_1988_301_5_a2,
     author = {I. B. Gashkov and V. M. Sidel'nikov},
     title = {Codes that are connected with a group of linear-fractional},
     journal = {Doklady Akademii Nauk},
     pages = {1041--1044},
     publisher = {mathdoc},
     volume = {301},
     number = {5},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_301_5_a2/}
}