Characters and the generalized Fitting subgroup
Rendiconti del Seminario Matematico della Università di Padova, Tome 80 (1988), pp. 83-85. 
@article{RSMUP_1988__80__83_0,
     author = {Navarro, Gabriel},
     title = {Characters and the generalized {Fitting} subgroup},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {83--85},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {80},
     year = {1988},
     mrnumber = {988114},
     zbl = {0671.20009},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1988__80__83_0/}
}
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Navarro, Gabriel. Characters and the generalized Fitting subgroup. Rendiconti del Seminario Matematico della Università di Padova, Tome 80 (1988), pp. 83-85. http://archive.numdam.org/item/RSMUP_1988__80__83_0/

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[3] I.M. Isaacs, Character theory of finite groups, Academic Press, New York, 1976. | MR | Zbl