@article{PDM_2009_10_a9,
     author = {A. M. Kovalev and V. A. Kozlovskii and V. F. Shcherbak},
     title = {Generalized invertibility of dynamical systems for encryption problems},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {20--21},
     publisher = {mathdoc},
     number = {10},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2009_10_a9/}
}