@article{SF_1976__13_134217,
     author = {J.A. Brzozowski},
     title = {A generalization of finiteness.},
     journal = {Semigroup forum},
     pages = {239--252},
     year = {1976},
     volume = {13},
     zbl = {0353.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__13_134217/}
}