@article{SF_1984__29_134669,
     author = {M. Yamada},
     title = {Finitely generated free *-bands.},
     journal = {Semigroup forum},
     pages = {13--16},
     year = {1984},
     volume = {29},
     zbl = {0545.20048},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__29_134669/}
}