@article{GDZPPN001256637,
title = {Finitely generated left commutative semigroups are residually finite.},
journal = {Semigroup forum},
volume = {30},
year = {1984},
pages = {347-354},
zbl = {0525.20046},
url = {http://dml.mathdoc.fr/item/GDZPPN001256637}
}
Nordahl, T. Finitely generated left commutative semigroups are residually finite.. Semigroup forum, Tome 30 (1984) pp. 347-354. http://gdmltest.u-ga.fr/item/GDZPPN001256637/