TY  - JOUR
AU  - C.M. Reis
TI  - On some non-rational congruences on free commutative semigroups.
JO  - Semigroup forum
PY  - 1993
SP  - 267
EP  - 284
VL  - 47
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1993__47_2_135277/
ID  - SF_1993__47_2_135277
ER  -