TY  - JOUR
AU  - Nelson, Evelyn
TI  - The Lattice of Equational Classes of Commutative Semigroups
JO  - Canadian journal of mathematics
PY  - 1971
SP  - 875
EP  - 895
VL  - 23
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-098-0/
DO  - 10.4153/CJM-1971-098-0
ID  - 10_4153_CJM_1971_098_0
ER  -