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@article{SF_1982__25_134588, author = {J.D. jr. Magill}, title = {Semigroups in which ... and ... coincide for regular elements.}, journal = {Semigroup forum}, pages = {383--385}, publisher = {mathdoc}, volume = {25}, year = {1982}, zbl = {0499.54032}, url = {http://geodesic.mathdoc.fr/item/SF_1982__25_134588/} }
J.D. jr. Magill. Semigroups in which ... and ... coincide for regular elements.. Semigroup forum, Tome 25 (1982), pp. 383-385. http://geodesic.mathdoc.fr/item/SF_1982__25_134588/