On the closure of the bicyclic semigroup.
Ahre, K.
Semigroup forum, Tome 24 (1982), p. 379-380 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1982-01-01
EUDML-ID : urn:eudml:doc:134586 
@article{GDZPPN001255886,
     title = {On the closure of the bicyclic semigroup.},
     journal = {Semigroup forum},
     volume = {24},
     year = {1982},
     pages = {379-380},
     zbl = {0507.22004},
     url = {http://dml.mathdoc.fr/item/GDZPPN001255886}
}

Ahre, K. On the closure of the bicyclic semigroup.. Semigroup forum, Tome 24 (1982) pp. 379-380. http://gdmltest.u-ga.fr/item/GDZPPN001255886/