@article{10_21136_CMJ_1969_100892,
     author = {Kaufman, Robert},
     title = {On a class of semi-group algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {248--251},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1969},
     doi = {10.21136/CMJ.1969.100892},
     mrnumber = {0250076},
     zbl = {0191.14002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100892/}
}