@article{BUMI_1966_3_21_2_144_0, author = {David F. Dawson}, title = {On subgroups of semigroups.}, journal = {Bollettino dell'Unione Matematica Italiana}, volume = {21}, year = {1966}, pages = {144-146}, zbl = {0143.03003}, mrnumber = {202872}, language = {en}, url = {http://dml.mathdoc.fr/item/BUMI_1966_3_21_2_144_0} }
Dawson, David F. On subgroups of semigroups.. Bollettino dell'Unione Matematica Italiana, Tome 21 (1966) pp. 144-146. http://gdmltest.u-ga.fr/item/BUMI_1966_3_21_2_144_0/
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