%0 Journal Article
%A Stephenson, W.
%T Unique Addition Rings
%J Canadian journal of mathematics
%D 1969
%P 1455-1461
%V 21
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-159-0/
%R 10.4153/CJM-1969-159-0
%F 10_4153_CJM_1969_159_0