@article{PDMA_2014_7_a21,
     author = {B. A. Pogorelov and M. A. Pudovkina},
     title = {On generalizations of {Markov's} approach to research of block ciphers},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {51--52},
     publisher = {mathdoc},
     number = {7},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2014_7_a21/}
}