@article{PDMA_2015_8_a19,
     author = {G. P. Agibalov},
     title = {Watermarking ciphers},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {54--59},
     publisher = {mathdoc},
     number = {8},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2015_8_a19/}
}