%0 Journal Article %A Abbott, H. L. %A Hanson, D. %T On A Combinatorial Problem of Erdös %J Canadian mathematical bulletin %D 1969 %P 823-829 %V 12 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-107-x/ %R 10.4153/CMB-1969-107-x %F 10_4153_CMB_1969_107_x