%0 Journal Article %A L. Ward %T Characterization of the fixed point property for a class of set-valued mappings %J Fundamenta Mathematicae %D 1961 %P 159-164 %V 50 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-50-2-159-164/ %R 10.4064/fm-50-2-159-164 %G en %F 10_4064_fm_50_2_159_164