@article{10_4153_CJM_1991_012_5,
     author = {Auinger, Karl},
     title = {Boolean {Congruence} {Lattices} of {Orthodox} {Semigroups}},
     journal = {Canadian journal of mathematics},
     pages = {225--241},
     year = {1991},
     volume = {43},
     number = {2},
     doi = {10.4153/CJM-1991-012-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1991-012-5/}
}