Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1975__10_134127, author = {H.L. Chow}, title = {Primitive idempotents in semigroups {(Research} {Problem} {#H7).}}, journal = {Semigroup forum}, pages = {373--373}, publisher = {mathdoc}, volume = {10}, year = {1975}, zbl = {0308.22003}, url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134127/} }
H.L. Chow. Primitive idempotents in semigroups (Research Problem #H7).. Semigroup forum, Tome 10 (1975), p. 373. http://geodesic.mathdoc.fr/item/SF_1975__10_134127/