Bibliography
- A.O.Anderson: Early Sources of Scottish History (Vol. I) (1922)
- M.O.Anderson: Kings & Kingship in Early Scotland (ISBN 0-7011-1930-6) (1973)
- H.M.Chadwick: Early Scotland (1949)
- B.T.Hudson: Kings of Celtic Scotland (ISBN 0-313-29087-3) (1994)
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