@article{10_1017_S0017089500006492,
     author = {Gould, Victoria},
     title = {Clifford semigroups of left quotients},
     journal = {Glasgow mathematical journal},
     pages = {181--191},
     year = {1986},
     volume = {28},
     number = {2},
     doi = {10.1017/S0017089500006492},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006492/}
}