[All]: There is some discrepancy between sources as to the length of Hákon’s reign. Theodoricus (MHN 11) gives thirty years, HN (MHN 115) and Oddr Snorrason (ÓTOdd 1932, 114) thirty-three years. Ágr (ÍF 29, 16) states that he ruled for twenty years after the death of Haraldr. It appears that the thirty-three years assigned to the length of his rule also include the thirteen years he was jarl in Trøndelag after the death of his father (see ÍF 26, 239; Ólafía Einarsdóttir 1964, 177-80).
- Ágr = [Anonymous] Ágrip af Nóregs konunga sögum.
- ÓTOdd 1932 = Finnur Jónsson, ed. 1932. Saga Óláfs Tryggvasonar af Oddr Snorrason munk. Copenhagen: Gad.
- MHN = Storm, Gustav, ed. 1880. Monumenta historica Norvegiæ: Latinske kildeskrifter til Norges historie i middelalderen. Kristiania (Oslo): Brøgger. Rpt. 1973. Oslo: Aas & Wahl.
- ÍF 26-8 = Heimskringla. Ed. Bjarni Aðalbjarnarson. 1941-51.
- HN = Historia Norwegiæ. In MHN 69-124.
- ÍF 29 = Ágrip af Nóregskonunga sǫgum; Fagrskinna—Nóregs konungatal. Ed. Bjarni Einarsson. 1985.
- Theodoricus = Theodrici monachi historia de antiquitate regum Norwagiensium. In MHN 1-68.
- Internal references
- Diana Whaley 2012, ‘(Biography of) Oddr Snorrason’ in Diana Whaley (ed.), Poetry from the Kings’ Sagas 1: From Mythical Times to c. 1035. Skaldic Poetry of the Scandinavian Middle Ages 1. Turnhout: Brepols, p. 890.