@article{10_4153_CMB_1978_050_7,
     author = {Chein, E. Z.},
     title = {On a {Conjecture} of {Graham} {Concerning} a {Sequence} of {Integers}},
     journal = {Canadian mathematical bulletin},
     pages = {285--287},
     year = {1978},
     volume = {21},
     number = {3},
     doi = {10.4153/CMB-1978-050-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-050-7/}
}