On some subsemigroups of a free semigroup.
Capocelli, R. M.
Semigroup forum, Tome 14 (1977), p. 125-136 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1977-01-01
EUDML-ID : urn:eudml:doc:134243 
@article{GDZPPN001252321,
     title = {On some subsemigroups of a free semigroup.},
     journal = {Semigroup forum},
     volume = {14},
     year = {1977},
     pages = {125-136},
     zbl = {0393.20042},
     url = {http://dml.mathdoc.fr/item/GDZPPN001252321}
}

Capocelli, R. M. On some subsemigroups of a free semigroup.. Semigroup forum, Tome 14 (1977) pp. 125-136. http://gdmltest.u-ga.fr/item/GDZPPN001252321/