@article{SF_1984__28_134666,
     author = {B.M. Castellano},
     title = {On the topological structure of a monoid on a manifold with boundary.},
     journal = {Semigroup forum},
     pages = {375--376},
     publisher = {mathdoc},
     volume = {28},
     year = {1984},
     zbl = {0529.22001},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__28_134666/}
}