%0 Journal Article
%A Erdős, P.
%T On A Combinatorial Problem III
%J Canadian mathematical bulletin
%D 1969
%P 413-416
%V 12
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-051-5/
%R 10.4153/CMB-1969-051-5
%F 10_4153_CMB_1969_051_5