TY  - JOUR
AU  - Stephenson, W.
TI  - Unique Addition Rings
JO  - Canadian journal of mathematics
PY  - 1969
SP  - 1455
EP  - 1461
VL  - 21
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-159-0/
DO  - 10.4153/CJM-1969-159-0
ID  - 10_4153_CJM_1969_159_0
ER  -