@article{ZNSL_2012_402_a2,
     author = {D. S. Ananichev and D. D. Dublennykh},
     title = {Lower bounds for the number of keys in {Zakrevskij} cipher},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {40--44},
     publisher = {mathdoc},
     volume = {402},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2012_402_a2/}
}