(Woolf 2005, p. 37). Para Earnwine, véxase (Kirby 1991, p. 150), (Yorke 1990, p. 90) Woolf, Alex (2005). "Onuist son of Uurguist: tyrannus carnifex or a David for the Picts?". En David Hill & Margaret Worthington. Aethelbald and Offa: Two Eighth-Century Kings of Mercia. British Archaeological Reports, British series 383. Oxford: Archaeopress. ISBN1-84171-687-1. Kirby, D. P. (1991). The Earliest English Kings. Londres: Unwin Hyman. ISBN0-04-445692-1.Yorke, Barbara (1990). Kings and Kingdoms of Early Anglo-Saxon England. Londres: Routledge. ISBN978-1-134-70724-9.