@article{10_1017_S0017089500003256,
     author = {Eberhart, Carl and Williams, Wiley},
     title = {Congruences on an orthodox semigroup via the minimum inverse semigroup congruence},
     journal = {Glasgow mathematical journal},
     pages = {181--192},
     year = {1977},
     volume = {18},
     number = {2},
     doi = {10.1017/S0017089500003256},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003256/}
}