Free groups in ßN which miss the minimal ideal.
Lisan, Amha Tume
Semigroup forum, Tome 37 (1988), p. 233-240 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1988-01-01
EUDML-ID : urn:eudml:doc:134927 
@article{GDZPPN001259377,
     title = {Free groups in \ss N which miss the minimal ideal.},
     journal = {Semigroup forum},
     volume = {37},
     year = {1988},
     pages = {233-240},
     zbl = {0652.22003},
     url = {http://dml.mathdoc.fr/item/GDZPPN001259377}
}

Lisan, Amha Tume. Free groups in ßN which miss the minimal ideal.. Semigroup forum, Tome 37 (1988) pp. 233-240. http://gdmltest.u-ga.fr/item/GDZPPN001259377/