%0 Journal Article %A C. Bessaga %T Central points of convex sets %J Colloquium Mathematicum %D 1971 %P 59-68 %V 37 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-37-1-59-68/ %R 10.4064/cm-37-1-59-68 %G en %F 10_4064_cm_37_1_59_68