@article{JRAM_1986__369_152850,
     author = {Everett C. Dade},
     title = {Clifford theory for group-graded rings.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {40--86},
     publisher = {mathdoc},
     volume = {369},
     year = {1986},
     zbl = {0583.16001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1986__369_152850/}
}