Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1967__26_2_115011, author = {Magill, Kenneth D. jr.}, title = {Subgroups of semigroups of functions}, journal = {Portugaliae mathematica}, pages = {133--147}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1967}, mrnumber = {0263057}, zbl = {0174.04404}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115011/} }
Magill, Kenneth D. jr. Subgroups of semigroups of functions. Portugaliae mathematica, Tome 26 (1967) no. 2, pp. 133-147. http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115011/