%0 Journal Article %A A. A. Razborov %T Lower bounds of the complexity of symmetric boolean functions of contact-rectifier circuits %J Matematičeskie zametki %D 1990 %P 79-90 %V 48 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1990_48_6_a9/ %G ru %F MZM_1990_48_6_a9