@article{10_1017_S0017089500009514,
     author = {Okni\'nski, Jan},
     title = {Prime and semiprime semigroup rings of cancellative semigroups},
     journal = {Glasgow mathematical journal},
     pages = {1--12},
     year = {1993},
     volume = {35},
     number = {1},
     doi = {10.1017/S0017089500009514},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500009514/}
}