%0 Journal Article
%A Johnsen, E. C.
%T Special Abelian Group Difference Sets
%J Canadian journal of mathematics
%D 1968
%P 1269-1275
%V 20
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-124-2/
%R 10.4153/CJM-1968-124-2
%F 10_4153_CJM_1968_124_2