%0 Journal Article %A R. Rankin %T Difference sets %J Acta Arithmetica %D 1964 %P 161-168 %V 9 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-9-2-161-168/ %R 10.4064/aa-9-2-161-168 %G en %F 10_4064_aa_9_2_161_168