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@article{SF_1975__10_134102, author = {A.H. Clifford}, title = {The fundamental representation of a regular semigroup.}, journal = {Semigroup forum}, pages = {84--92}, publisher = {mathdoc}, volume = {10}, year = {1975}, zbl = {0298.20052}, url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134102/} }
A.H. Clifford. The fundamental representation of a regular semigroup.. Semigroup forum, Tome 10 (1975), pp. 84-92. http://geodesic.mathdoc.fr/item/SF_1975__10_134102/