@article{SF_1976__12_134176,
     author = {L. O'Carroll},
     title = {Idempotent-determined congruences on inverse semigroups.},
     journal = {Semigroup forum},
     pages = {233--244},
     publisher = {mathdoc},
     volume = {12},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134176/}
}