@article{SF_1986__34_134833,
     author = {S.Y. Shaw and C.Y. Lin},
     title = {Addendum to },
     journal = {Semigroup forum},
     pages = {124--126},
     publisher = {mathdoc},
     volume = {34},
     year = {1986},
     zbl = {0619.47036},
     url = {http://geodesic.mathdoc.fr/item/SF_1986__34_134833/}
}