@article{VSGTU_2014_1_a16,
     author = {S. M. Ratseev},
     title = {On {Construction} of {Perfect} {Ciphers}},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {192--199},
     publisher = {mathdoc},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2014_1_a16/}
}