%0 Journal Article %A Gonzalo, Raquel %T Upper and lower estimates in Banach sequence spaces %J Commentationes Mathematicae Universitatis Carolinae %D 1995 %P 641-653 %V 36 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1995__36_4_a3/ %G en %F CMUC_1995__36_4_a3