%0 Journal Article %A I. Singer %T On the constants of basic sequences in Banach spaces %J Studia Mathematica %D 1968 %P 125-134 %V 31 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-31-2-125-134/ %R 10.4064/sm-31-2-125-134 %G en %F 10_4064_sm_31_2_125_134