@article{SF_1996__52_3_135432,
     author = {P.M. Higgins},
     title = {Epis from locally inverse semigroups are onto.},
     journal = {Semigroup forum},
     pages = {49--54},
     year = {1996},
     volume = {52},
     number = {3},
     zbl = {0840.20066},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135432/}
}