@article{10_4064_aa_32_3_233_238,
     author = {William V\'elez},
     title = {Some remarks on a number theoretic problem of {Graham}},
     journal = {Acta Arithmetica},
     pages = {233--238},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1977},
     doi = {10.4064/aa-32-3-233-238},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-32-3-233-238/}
}