@article{MVK_2014_5_1_a6,
     author = {V. N. Sachkov},
     title = {Difference specification of substitutions and partitions in a~residue ring},
     journal = {Matemati\v{c}eskie voprosy kriptografii},
     pages = {127--150},
     year = {2014},
     volume = {5},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MVK_2014_5_1_a6/}
}