@article{10_4153_CMB_2004_035_7,
     author = {Ford, Kevin},
     title = {A {Strong} {Form} of a {Problem} of {R.} {L.} {Graham}},
     journal = {Canadian mathematical bulletin},
     pages = {358--368},
     year = {2004},
     volume = {47},
     number = {3},
     doi = {10.4153/CMB-2004-035-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2004-035-7/}
}