On the number of semigroups of natural numbers.
Backelin, Jörgen
Mathematica Scandinavica, Tome 67 (1990), p. 197-215 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1990-01-01
EUDML-ID : urn:eudml:doc:167105 
@article{GDZPPN002360519,
     title = {On the number of semigroups of natural numbers.},
     journal = {Mathematica Scandinavica},
     volume = {67},
     year = {1990},
     pages = {197-215},
     zbl = {0741.11006},
     url = {http://dml.mathdoc.fr/item/GDZPPN002360519}
}

Backelin, Jörgen. On the number of semigroups of natural numbers.. Mathematica Scandinavica, Tome 67 (1990) pp. 197-215. http://gdmltest.u-ga.fr/item/GDZPPN002360519/