A sketch of the lattice of commutative nilpotent semigroup varieties.
Korjakov, I.O.
Semigroup forum, Tome 24 (1982), p. 285-318 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1982-01-01
EUDML-ID : urn:eudml:doc:134553 
@article{GDZPPN00125555X,
     title = {A sketch of the lattice of commutative nilpotent semigroup varieties.},
     journal = {Semigroup forum},
     volume = {24},
     year = {1982},
     pages = {285-318},
     zbl = {0493.20039},
     url = {http://dml.mathdoc.fr/item/GDZPPN00125555X}
}

Korjakov, I.O. A sketch of the lattice of commutative nilpotent semigroup varieties.. Semigroup forum, Tome 24 (1982) pp. 285-318. http://gdmltest.u-ga.fr/item/GDZPPN00125555X/