%0 Journal Article %A Bünyamin Sarı %T Envelope functions and asymptotic structures in Banach spaces %J Studia Mathematica %D 2004 %P 283-306 %V 164 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm164-3-6/ %R 10.4064/sm164-3-6 %G en %F 10_4064_sm164_3_6