@article{PDM_2012_1_a2,
     author = {K. G. Kogos and V. M. Fomichev},
     title = {About branchings of cryptographic functions on transformations with the prescribed sign},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {50--54},
     publisher = {mathdoc},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2012_1_a2/}
}