@article{10_4153_CMB_1969_107_x,
     author = {Abbott, H. L. and Hanson, D.},
     title = {On {A} {Combinatorial} {Problem} of {Erd\"os}},
     journal = {Canadian mathematical bulletin},
     pages = {823--829},
     year = {1969},
     volume = {12},
     number = {6},
     doi = {10.4153/CMB-1969-107-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-107-x/}
}