Iranzo Aznar, M; Martínez Pastor, Ana; Pérez Monasor, F.(Elsevier, 1995-11-10)
[EN] Given a Fitting class F and an F-group S we find a subgroup W(S) of S, Z(S) less than or equal to W(S), which is normal in every group H containing S as an F-injector, provided that H verifies certain conditions.