%0 Journal Article %A Mordechai Lewin %T Choice Mappings of Certain Classes of Finite Sets. %J Mathematische Zeitschrift %D 1972 %P 23-36 %V 124 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1972__124_171652/ %F MZ_1972__124_171652