@article{1102983611, author = {Fein, Burton}, title = {The Schur index for projective representations of finite groups.}, journal = {Pacific J. Math.}, volume = {31}, number = {3}, year = {1969}, pages = { 87-100}, language = {en}, url = {http://dml.mathdoc.fr/item/1102983611} }
Fein, Burton. The Schur index for projective representations of finite groups.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 87-100. http://gdmltest.u-ga.fr/item/1102983611/