%0 Journal Article %A M. Zuckerman %T On choosing subsets of n-element sets %J Fundamenta Mathematicae %D 1969 %P 163-179 %V 64 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-64-2-163-179/ %R 10.4064/fm-64-2-163-179 %G en %F 10_4064_fm_64_2_163_179