@article{PDM_2013_3_a4,
     author = {V. A. Romankov},
     title = {Cryptanalysis of some schemes applying automorphisms},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {35--51},
     publisher = {mathdoc},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2013_3_a4/}
}