%0 Journal Article
%A Schonheim, J.
%T On A Problem of Purdy Related to Sperner Systems
%J Canadian mathematical bulletin
%D 1974
%P 135-136
%V 17
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-029-1/
%R 10.4153/CMB-1974-029-1
%F 10_4153_CMB_1974_029_1