%0 Journal Article %A Andrzej Ɓuczak %T Range of a contractive strongly positive projection in a $C^*$-algebra %J Colloquium Mathematicum %D 2015 %P 87-89 %V 140 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm140-1-7/ %R 10.4064/cm140-1-7 %G en %F 10_4064_cm140_1_7