On middle units in orthodox semigroups.
Blyth, T.S.
Semigroup forum, Tome 12 (1976), p. 261-266 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1976-01-01
EUDML-ID : urn:eudml:doc:134219 
@article{GDZPPN001251783,
     title = {On middle units in orthodox semigroups.},
     journal = {Semigroup forum},
     volume = {12},
     year = {1976},
     pages = {261-266},
     zbl = {0353.20057},
     url = {http://dml.mathdoc.fr/item/GDZPPN001251783}
}

Blyth, T.S. On middle units in orthodox semigroups.. Semigroup forum, Tome 12 (1976) pp. 261-266. http://gdmltest.u-ga.fr/item/GDZPPN001251783/