@article{SF_1997__54_2_135521,
     author = {M.A. Chaudhry and M.J. Crabb and McGregor C.M.},
     title = {The primitivity of semigroup algebras of free products.},
     journal = {Semigroup forum},
     pages = {221--229},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {1997},
     zbl = {0870.16018},
     url = {http://geodesic.mathdoc.fr/item/SF_1997__54_2_135521/}
}