@article{SF_1980__19_134393,
     author = {C.C. Edwards},
     title = {F-regular and {F-orthodox} semigroups.},
     journal = {Semigroup forum},
     pages = {331--346},
     publisher = {mathdoc},
     volume = {19},
     year = {1980},
     zbl = {0432.20052},
     url = {http://geodesic.mathdoc.fr/item/SF_1980__19_134393/}
}