@article{PDM_2015_4_a3,
     author = {N. V. Medvedeva and S. S. Titov},
     title = {Description of non-endomorphic maximum perfect ciphers with two-valued plaintext alphabet},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {43--55},
     publisher = {mathdoc},
     number = {4},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2015_4_a3/}
}