QuelleCoupland, Simon: From poachers to gamekeepers: Scandinavian warlords and Carolingian kings, in: Early Medieval Europe, 7, 1998, S. 85–114 FundortS. 95-101
QuelleLexikon des Mittelalters. Auty, Robert [u. a.] [Hrsgg.]. Bd 1-9. Registerbd. München [u. a.]: Artemis, 1980-1999 FundortBd 7, Sp. 1026