%0 Journal Article %A V. A. Roman'kov %T Discrete logarithm for nilpotent groups and cryptanalysis of polylinear cryptographic system %J Prikladnaya Diskretnaya Matematika. Supplement %D 2019 %P 154-160 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/PDMA_2019_12_a43/ %G en %F PDMA_2019_12_a43