%0 Journal Article %A John Olson %T Sums of sets of group elements %J Acta Arithmetica %D 1975 %P 147-156 %V 28 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-28-2-147-156/ %R 10.4064/aa-28-2-147-156 %G en %F 10_4064_aa_28_2_147_156