%0 Journal Article %A V. Proizvolov %T On the pointwise and integral cardinality of systems of subsets of a topological space %J Doklady Akademii Nauk %D 1965 %P 296-299 %V 161 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_161_2_a10/ %G ru %F DAN_1965_161_2_a10