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@article{SF_1996__52_3_135432, author = {P.M. Higgins}, title = {Epis from locally inverse semigroups are onto.}, journal = {Semigroup forum}, pages = {49--54}, publisher = {mathdoc}, volume = {52}, number = {3}, year = {1996}, zbl = {0840.20066}, url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135432/} }
P.M. Higgins. Epis from locally inverse semigroups are onto.. Semigroup forum, Tome 52 (1996) no. 3, pp. 49-54. http://geodesic.mathdoc.fr/item/SF_1996__52_3_135432/