A note on left cancellative semigroups without idempotents.
Chen, G.h.
Semigroup forum, Tome 7 (1974), p. 278-282 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1974-01-01
EUDML-ID : urn:eudml:doc:134085 
@article{GDZPPN001250329,
     title = {A note on left cancellative semigroups without idempotents.},
     journal = {Semigroup forum},
     volume = {7},
     year = {1974},
     pages = {278-282},
     zbl = {0298.20062},
     url = {http://dml.mathdoc.fr/item/GDZPPN001250329}
}

Chen, G.h. A note on left cancellative semigroups without idempotents.. Semigroup forum, Tome 7 (1974) pp. 278-282. http://gdmltest.u-ga.fr/item/GDZPPN001250329/