%0 Journal Article %A A. A. Voronenko %T On the universality of product for classes of linear functions of two variables %J Diskretnaya Matematika %D 2022 %P 20-22 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DM_2022_34_1_a1/ %G ru %F DM_2022_34_1_a1