TY  - JOUR
AU  - Jr., C. S. Johnson
AU  - McMorris, F. R.
TI  - Commutative Non-Singular Semigroups
JO  - Canadian mathematical bulletin
PY  - 1977
SP  - 263
EP  - 265
VL  - 20
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-040-5/
DO  - 10.4153/CMB-1977-040-5
ID  - 10_4153_CMB_1977_040_5
ER  -