Definability in the lattice of equational theories of semigroups.
Jezek, J. ; McKenzie, R.
Semigroup forum, Tome 46 (1993), p. 199-245 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1993-01-01
EUDML-ID : urn:eudml:doc:135231 
@article{GDZPPN001262475,
     title = {Definability in the lattice of equational  theories of semigroups.},
     journal = {Semigroup forum},
     volume = {46},
     year = {1993},
     pages = {199-245},
     zbl = {0782.20051},
     url = {http://dml.mathdoc.fr/item/GDZPPN001262475}
}

Jezek, J.; McKenzie, R. Definability in the lattice of equational  theories of semigroups.. Semigroup forum, Tome 46 (1993) pp. 199-245. http://gdmltest.u-ga.fr/item/GDZPPN001262475/