%0 Journal Article %A William Vélez %T Some remarks on a number theoretic problem of Graham %J Acta Arithmetica %D 1977 %P 233-238 %V 32 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-32-3-233-238/ %R 10.4064/aa-32-3-233-238 %G en %F 10_4064_aa_32_3_233_238