%0 Journal Article %A Z. Lipecki %T Extensions of positive operators and extreme points. III %J Colloquium Mathematicum %D 1982 %P 263-268 %V 46 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-46-2-263-268/ %R 10.4064/cm-46-2-263-268 %G en %F 10_4064_cm_46_2_263_268