@article{SF_1978__16_134288,
     author = {A.Y.W. Lau},
     title = {Quotients of compact 0-dimensional semigroups and groupoids.},
     journal = {Semigroup forum},
     pages = {197--198},
     publisher = {mathdoc},
     volume = {16},
     year = {1978},
     zbl = {0386.22004},
     url = {http://geodesic.mathdoc.fr/item/SF_1978__16_134288/}
}