%0 Journal Article %A Ricker, Werner J. %T Sequential closures of $\sigma$-subalgebras for a vector measure %J Commentationes Mathematicae Universitatis Carolinae %D 1996 %P 91-97 %V 37 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1996__37_1_a4/ %G en %F CMUC_1996__37_1_a4