%0 Journal Article
%A N. N. Tokareva
%T Quadratic approximations of the special type for the 4-bit permutations in S-boxes
%J Prikladnaâ diskretnaâ matematika
%D 2008
%P 50-54
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PDM_2008_1_a9/
%G ru
%F PDM_2008_1_a9