%0 Journal Article %A Jens Peter Reus Christensen %T Necessary and Sufficient Conditions for the Measurability of Certain Sets of Closed Subsets. %J Mathematische Annalen %D 1973 %P 189-194 %V 200 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1973__200_162352/ %F MAN_1973__200_162352