%0 Journal Article %A Nigel Kalton %T Convexity, type and three space problem %J Studia Mathematica %D 1981 %P 247-287 %V 69 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-69-3-247-287/ %R 10.4064/sm-69-3-247-287 %G en %F 10_4064_sm_69_3_247_287