Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1977__14_186373, author = {T. E. Hays}, title = {...- semigroups.}, journal = {Semigroup forum}, pages = {277--282}, publisher = {mathdoc}, volume = {14}, year = {1977}, zbl = {0387.22002}, url = {http://geodesic.mathdoc.fr/item/SF_1977__14_186373/} }
T. E. Hays. ...- semigroups.. Semigroup forum, Tome 14 (1977), pp. 277-282. http://geodesic.mathdoc.fr/item/SF_1977__14_186373/