Jelaskan Silsilah dari Donnchadh I

Anderson, Alan Orr, Early Sources of Scottish History AD 500 to 1286, volume one. Republished with corrections, Paul Watkins, Stamford, 1990. ISBN 1-871615-03-8

Broun, Dauvit, "Duncan I (d. 1040)", Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 15 May 2007

Duncan, A. A. M., The Kingship of the Scots 842–1292: Succession and Independence. Edinburgh University Press, Edinburgh, 2002. ISBN 0-7486-1626-8

Oram, Richard, David I: The King Who Made Scotland. Tempus, Stroud, 2004. ISBN 0-7524-2825-X