Tolong jelaskan mengenai Studi kritis dari Historia Brittonum

{{citation|last=Dumville|first=David N.|year=1974|title=Some aspects of the chronology of the Historia Brittonum|journal=Bulletin of the Board of Celtic Studies|volume=25.4|pages=439–45}}

P. J. C. Field, 'Nennius and His History' Studia Celtica'' 30 (1996) 159-65