@article{PDM_2008_2_a8,
     author = {A. M. Kovalev and V. A. Kozlovskii and V. F. Shcherbak},
     title = {Inverse dynamical systems with variable dimension of phase space in problems of cryptographic information transformation},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {39--44},
     publisher = {mathdoc},
     number = {2},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2008_2_a8/}
}