@article{10_4064_aa_40_2_209_211,
     author = {R. Simpson},
     title = {On a conjecture of {R.} {L.} {Graham}},
     journal = {Acta Arithmetica},
     pages = {209--211},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1981},
     doi = {10.4064/aa-40-2-209-211},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-40-2-209-211/}
}