The free completely regular semigroup on a set.
Clifford, A.H.
Semigroup forum, Tome 18 (1979), p. 87-92 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1979-01-01
EUDML-ID : urn:eudml:doc:134344 
@article{GDZPPN001253379,
     title = {The free completely regular semigroup on a set.},
     journal = {Semigroup forum},
     volume = {18},
     year = {1979},
     pages = {87-92},
     zbl = {0462.20047},
     url = {http://dml.mathdoc.fr/item/GDZPPN001253379}
}

Clifford, A.H. The free completely regular semigroup on a set.. Semigroup forum, Tome 18 (1979) pp. 87-92. http://gdmltest.u-ga.fr/item/GDZPPN001253379/