Sui caratteri unipotenti di alcuni gruppi classici finiti Marco Antonio Pellegrini — 2007 Bollettino dell'Unione Matematica Italiana
Finite Simple Groups Admitting Minimally Irreducible Characters of Prime Power Degree Marco Antonio Pellegrini — 2007 Bollettino dell'Unione Matematica Italiana In this paper we classify the finite simple groups that admit an irreducible complex character of prime power degree which is reducible over any proper sub-group.