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@article{PORMA_1978__37_1-2_115331, author = {Ford, Charles}, title = {More on the {Schur} index of a representation of a finite group}, journal = {Portugaliae mathematica}, pages = {39--44}, publisher = {mathdoc}, volume = {37}, number = {1-2}, year = {1978}, mrnumber = {0620296}, zbl = {0481.20012}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1978__37_1-2_115331/} }
Ford, Charles. More on the Schur index of a representation of a finite group. Portugaliae mathematica, Tome 37 (1978) no. 1-2, pp. 39-44. http://geodesic.mathdoc.fr/item/PORMA_1978__37_1-2_115331/