%0 Journal Article %A Ekrem Savaj %T Some Sequence Spaces with an Index %J Mathematica balkanica %D 1992 %P 353 %V 6 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_1992_6_4_a6/ %F MABA_1992_6_4_a6