@article{JRAM_1981__324_152354,
     author = {Hideo Sato},
     title = {Semigroup ring construction of {Frobenius} extensions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {211--220},
     publisher = {mathdoc},
     volume = {324},
     year = {1981},
     zbl = {0447.16015},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1981__324_152354/}
}