%0 Journal Article %A S. J. Dilworth %A David Mitra %T A conditional quasi-greedy basis of $l_1$ %J Studia Mathematica %D 2001 %P 95-100 %V 144 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm144-1-4/ %R 10.4064/sm144-1-4 %G en %F 10_4064_sm144_1_4