%0 Journal Article %A D. A. Soshin %T The presentation of Magma and $2$-GOST block cipher semibyte substitutions by algebraic threshold functions %J Prikladnaya Diskretnaya Matematika. Supplement %D 2016 %P 32-34 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/PDMA_2016_9_a12/ %G ru %F PDMA_2016_9_a12