On the membership problem for pseudo-varieties of commutative semigroups.
Almeida, J.
Semigroup forum, Tome 43 (1991), p. 47-52 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1991-01-01
EUDML-ID : urn:eudml:doc:135062 
@article{GDZPPN001260758,
     title = {On the membership problem for pseudo-varieties of commutative semigroups.},
     journal = {Semigroup forum},
     volume = {43},
     year = {1991},
     pages = {47-52},
     zbl = {0728.20050},
     url = {http://dml.mathdoc.fr/item/GDZPPN001260758}
}

Almeida, J. On the membership problem for pseudo-varieties of commutative semigroups.. Semigroup forum, Tome 43 (1991) pp. 47-52. http://gdmltest.u-ga.fr/item/GDZPPN001260758/