%0 Journal Article %A Pták, Vlastimil %T Biorthogonal systems and reflexivity of Banach spaces %J Czechoslovak Mathematical Journal %D 1959 %P 319-326 %V 09 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1959.100359/ %R 10.21136/CMJ.1959.100359 %G en %F 10_21136_CMJ_1959_100359