%0 Journal Article %A I. M. Nikonov %T Weak parities and functorial maps %J Contemporary Mathematics. Fundamental Directions %D 2013 %P 123-141 %V 51 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2013_51_a7/ %G ru %F CMFD_2013_51_a7