%0 Journal Article %A John, Kamil %T $w^*$-basic sequences and reflexivity of Banach spaces %J Czechoslovak Mathematical Journal %D 2005 %P 677-681 %V 55 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2005__55_3_a8/ %G en %F CMJ_2005__55_3_a8