Another semigroup characterization of the simple closed curve.
Subbiah, S. ; Magill, K.D. jr.
Semigroup forum, Tome 20 (1980), p. 89-90 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1980-01-01
EUDML-ID : urn:eudml:doc:134405 
@article{GDZPPN001254014,
     title = {Another semigroup characterization of the simple closed curve.},
     journal = {Semigroup forum},
     volume = {20},
     year = {1980},
     pages = {89-90},
     zbl = {0437.54029},
     url = {http://dml.mathdoc.fr/item/GDZPPN001254014}
}

Subbiah, S.; Magill, K.D. jr. Another semigroup characterization of the simple closed curve.. Semigroup forum, Tome 20 (1980) pp. 89-90. http://gdmltest.u-ga.fr/item/GDZPPN001254014/