%0 Journal Article %A Marek Lassak %T Convex half-spaces %J Fundamenta Mathematicae %D 1984 %P 7-13 %V 120 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-120-1-7-13/ %R 10.4064/fm-120-1-7-13 %G en %F 10_4064_fm_120_1_7_13