↑Downham, Clare (2007), Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014, Edinburgh: Dunedin, ISBN978-1-903765-89-0, OCLC163618313
↑Keynes, Simon (2014). "Appendix I: Rulers of the English, c.450–1066". In Lapidge, Michael (ed.). The Wiley-Blackwell Encyclopedia of Anglo-Saxon England. Chichester: John Wiley & Sons. ISBN978-0-470-65632-7.
↑Kirby, D. P. The Earliest English Kings. London and New York: Routledge. ISBN978-0-4152-4211-0.
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