TY  - JOUR
AU  - Almeida, Jorge
TI  - Some Order Properties of the Lattice of Varieties of Commutative Semigroups
JO  - Canadian journal of mathematics
PY  - 1986
SP  - 19
EP  - 47
VL  - 38
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1986-002-x/
DO  - 10.4153/CJM-1986-002-x
ID  - 10_4153_CJM_1986_002_x
ER  -