%0 Journal Article %A Daniel Freeman %T Weakly null sequences with upper estimates %J Studia Mathematica %D 2008 %P 79-102 %V 184 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm184-1-4/ %R 10.4064/sm184-1-4 %G en %F 10_4064_sm184_1_4