%0 Journal Article
%A Halberstam, H.
%A Laxton, R. R.
%T Perfect difference sets
%J Glasgow mathematical journal
%D 1964
%P 177-184
%V 6
%N 4
%U http://geodesic.mathdoc.fr/articles/10.1017/S2040618500034985/
%R 10.1017/S2040618500034985
%F 10_1017_S2040618500034985