@article{JRAM_1988__387_153030,
     author = {Everett C. Dade},
     title = {Clifford theory for group-graded rings. {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {148--181},
     publisher = {mathdoc},
     volume = {387},
     year = {1988},
     zbl = {0638.16001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1988__387_153030/}
}