Arno Borst, Medieval Worlds : Barbarians, Heretics, and Artists in the Middle Ages, University of Chicago, 1992, ISBN0-226-06656-8, p. 132.
The phrase is first recorded in the contemporary Historia Norwegiæ – Knut Helle, The Cambridge History of Scandinavia Volume 1, Prehistory to 1520, Cambridge University Press, 2003, ISBN0-521-47299-7, p. 379.
Birgit and Peter Sawyer, Medieval Scandinavia: from Conversion to Reformation, circa 800-1500, Minneapolis: University of Minnesota Press, 1993, ISBN0-8166-1738-4, p. 61.
Turville-Petre, pp. 14: "According to Ynglingatal, the first five members were all buried in Vestfold; which implies that this was the centre of their power. Yet Ari entitles the first member Upplendingakonungr. In Icelandic historical tradition the emphasis is on the mountain regions"; 15: "The Skjǫldungs were not in question . . . ; the Ynglings of Sweden were chosen".
Claus Krag, Ynglingatal og Ynglingasaga: en studie i historiske kilder, Oslo: Universitetsforlaget 1991, OCLC 256562288, pp. 231, 243(in Norwegian)
Jo Rune Ugulen, "Kongar i dei norske ættetavlene"Archived 28 February 2007 at the Wayback Machine (Kings in the Norwegian genealogies), Norsk Slektshistorisk Forening 1999/2000, reprinted from Genealogen 99.1, pp. 20–23 (in Nynorsk)
snl.no
"Harald Hårfagre". Store norske leksikon AS. Retrieved 22 January 2014.
Jo Rune Ugulen, "Kongar i dei norske ættetavlene"Archived 28 February 2007 at the Wayback Machine (Kings in the Norwegian genealogies), Norsk Slektshistorisk Forening 1999/2000, reprinted from Genealogen 99.1, pp. 20–23 (in Nynorsk)
