%0 Journal Article %A Murray Bell %T Tightness and π-character in centered spaces %J Colloquium Mathematicum %D 1999 %P 297-307 %V 80 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-80-2-297-307/ %R 10.4064/cm-80-2-297-307 %G en %F 10_4064_cm_80_2_297_307