%0 Journal Article %A V. B. Alekseev %T The number of families of subsets that are closed with respect to intersections %J Diskretnaya Matematika %D 1989 %P 129-136 %V 1 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DM_1989_1_2_a11/ %G ru %F DM_1989_1_2_a11