Naismith (2017) pp. 281, 300–301; McGuigan (2015a) p. 31, 31 n. 48; Downham (2013); Downham (2007) pp. 119–120, 120 n. 74; Woolf (2002) p. 39. Naismith, R (2017). Naismith, Rory (ed.). Medieval European Coinage. Vol. 8. Cambridge: Cambridge University Press. doi:10.1017/CBO9781139031370. ISBN9780521260169. McGuigan, N (2015a). "Ælla and the Descendants of Ivar: Politics and Legend in the Viking Age". Northern History. 52 (1): 20–34. doi:10.1179/0078172X14Z.00000000075. eISSN1745-8706. ISSN0078-172X. S2CID161252048. Downham, C (2013a). "Eric Bloodaxe – Axed? The Mystery of the Last Scandinavian King of York". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 181–208. ISBN978-0-9557720-1-6. ISSN2051-6509. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0. Woolf, A (2002). "Amlaíb Cuarán and the Gael, 941–81". In Duffy, S (ed.). Medieval Dublin. Vol. 3. Dublin: Four Courts Press. pp. 34–43.
Wadden (2015) p. 28; Thornton (2001) p. 73. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Thornton, DE (2001). "Edgar and the Eight Kings, AD 973: Textus et Dramatis Personae". Early Medieval Europe. 10 (1): 49–79. doi:10.1111/1468-0254.00079. eISSN1468-0254. hdl:11693/24776. S2CID162915120.
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Etchingham (2007) p. 157; Hudson (2005) p. 65; Etchingham (2001) pp. 173–175. Etchingham, C (2007). "Viking-Age Gwynedd and Ireland: Political Relations". In Wooding, JM; Jankulak, K (eds.). Ireland and Wales in the Middle Ages. Dublin: Four Courts Press. pp. 149–167. ISBN978-1-85182-748-0. Hudson, BT (2005). Viking Pirates and Christian Princes: Dynasty, Religion, and Empire in the North Atlantic. Oxford: Oxford University Press. ISBN978-0-19-516237-0. Etchingham, C (2001). "North Wales, Ireland and the Isles: the Insular Viking Zone". Peritia. 15: 145–187. doi:10.1484/J.Peri.3.434. eISSN2034-6506. ISSN0332-1592.
Sheehan (2010). Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285.
McGuigan (2015b) p. 107; Wadden (2015) p. 27; Woolf (2007a) p. 206; Hudson (2005) p. 65; Sellar (2000) p. 189 n. 9. McGuigan, N (2015b). Neither Scotland nor England: Middle Britain, c.850–1150 (PhD thesis). University of St Andrews. hdl:10023/7829. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Woolf, A (2007a). From Pictland to Alba, 789–1070. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN978-0-7486-1233-8. Hudson, BT (2005). Viking Pirates and Christian Princes: Dynasty, Religion, and Empire in the North Atlantic. Oxford: Oxford University Press. ISBN978-0-19-516237-0. Sellar, WDH (2000). "Hebridean Sea Kings: The Successors of Somerled, 1164–1316". In Cowan, EJ; McDonald, RA (eds.). Alba: Celtic Scotland in the Middle Ages. East Linton: Tuckwell Press. pp. 187–218. ISBN1-86232-151-5.
McGuigan (2015b) p. 107; Wadden (2015) p. 27; Downham (2013b) p. 86; Woolf (2007a) p. 298. McGuigan, N (2015b). Neither Scotland nor England: Middle Britain, c.850–1150 (PhD thesis). University of St Andrews. hdl:10023/7829. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Downham, C (2013b). "Irish Chronicles as a Source for Rivalry Between Vikings, A.D. 795–1014". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 75–89. ISBN978-0-9557720-1-6. ISSN2051-6509. Woolf, A (2007a). From Pictland to Alba, 789–1070. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN978-0-7486-1233-8.
Jennings, A (1994) p. 215. Jennings, A (1994). Historical Study of the Gael and Norse in Western Scotland From c.795 to c.1000 (PhD thesis). University of Edinburgh. hdl:1842/15749.
Sheehan (2010) p. 24 fig. 2. Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285.
Etchingham (2007) p. 157; Williams, DGE (1997) p. 141. Etchingham, C (2007). "Viking-Age Gwynedd and Ireland: Political Relations". In Wooding, JM; Jankulak, K (eds.). Ireland and Wales in the Middle Ages. Dublin: Four Courts Press. pp. 149–167. ISBN978-1-85182-748-0. Williams, DGE (1997). Land Assessment and Military Organisation in the Norse Settlements in Scotland, c.900–1266 AD (PhD thesis). University of St Andrews. hdl:10023/7088.
Wadden (2015) p. 28; Thornton (2001) p. 73. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Thornton, DE (2001). "Edgar and the Eight Kings, AD 973: Textus et Dramatis Personae". Early Medieval Europe. 10 (1): 49–79. doi:10.1111/1468-0254.00079. eISSN1468-0254. hdl:11693/24776. S2CID162915120.
Downham (2013b) p. 86; Sheehan (2010) p. 25; Downham (2007) pp. 54–55. Downham, C (2013b). "Irish Chronicles as a Source for Rivalry Between Vikings, A.D. 795–1014". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 75–89. ISBN978-0-9557720-1-6. ISSN2051-6509. Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0.
Downham (2014) p. 17; Sheehan (2010) p. 25; Sheehan; Stummann Hansen; Ó Corráin (2001) p. 112. Downham, C (2014). "Vikings' Settlements in Ireland Before 1014". In Sigurðsson, JV; Bolton, T (eds.). Celtic-Norse Relationships in the Irish Sea in the Middle Ages, 800–1200. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 1–21. ISBN978-90-04-25512-8. ISSN1569-1462. Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285. Sheehan, J; Stummann Hansen, S; Ó Corráin, D (2001). "A Viking Age Maritime Haven: A Reassessment of the Island Settlement at Beginish, Co. Kerry". The Journal of Irish Archaeology. 10: 93–119. ISSN0268-537X. JSTOR30001672.
Jennings, A (1994) p. 216 n. 33. Jennings, A (1994). Historical Study of the Gael and Norse in Western Scotland From c.795 to c.1000 (PhD thesis). University of Edinburgh. hdl:1842/15749.
Downham (2014) p. 17; Sheehan (2010) p. 25; Sheehan; Stummann Hansen; Ó Corráin (2001) p. 112. Downham, C (2014). "Vikings' Settlements in Ireland Before 1014". In Sigurðsson, JV; Bolton, T (eds.). Celtic-Norse Relationships in the Irish Sea in the Middle Ages, 800–1200. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 1–21. ISBN978-90-04-25512-8. ISSN1569-1462. Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285. Sheehan, J; Stummann Hansen, S; Ó Corráin, D (2001). "A Viking Age Maritime Haven: A Reassessment of the Island Settlement at Beginish, Co. Kerry". The Journal of Irish Archaeology. 10: 93–119. ISSN0268-537X. JSTOR30001672.
Naismith (2017) pp. 281, 300–301; McGuigan (2015a) p. 31, 31 n. 48; Downham (2013); Downham (2007) pp. 119–120, 120 n. 74; Woolf (2002) p. 39. Naismith, R (2017). Naismith, Rory (ed.). Medieval European Coinage. Vol. 8. Cambridge: Cambridge University Press. doi:10.1017/CBO9781139031370. ISBN9780521260169. McGuigan, N (2015a). "Ælla and the Descendants of Ivar: Politics and Legend in the Viking Age". Northern History. 52 (1): 20–34. doi:10.1179/0078172X14Z.00000000075. eISSN1745-8706. ISSN0078-172X. S2CID161252048. Downham, C (2013a). "Eric Bloodaxe – Axed? The Mystery of the Last Scandinavian King of York". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 181–208. ISBN978-0-9557720-1-6. ISSN2051-6509. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0. Woolf, A (2002). "Amlaíb Cuarán and the Gael, 941–81". In Duffy, S (ed.). Medieval Dublin. Vol. 3. Dublin: Four Courts Press. pp. 34–43.
Wadden (2015) p. 28; Thornton (2001) p. 73. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Thornton, DE (2001). "Edgar and the Eight Kings, AD 973: Textus et Dramatis Personae". Early Medieval Europe. 10 (1): 49–79. doi:10.1111/1468-0254.00079. eISSN1468-0254. hdl:11693/24776. S2CID162915120.
Naismith (2017) pp. 281, 300–301; McGuigan (2015a) p. 31, 31 n. 48; Downham (2013); Downham (2007) pp. 119–120, 120 n. 74; Woolf (2002) p. 39. Naismith, R (2017). Naismith, Rory (ed.). Medieval European Coinage. Vol. 8. Cambridge: Cambridge University Press. doi:10.1017/CBO9781139031370. ISBN9780521260169. McGuigan, N (2015a). "Ælla and the Descendants of Ivar: Politics and Legend in the Viking Age". Northern History. 52 (1): 20–34. doi:10.1179/0078172X14Z.00000000075. eISSN1745-8706. ISSN0078-172X. S2CID161252048. Downham, C (2013a). "Eric Bloodaxe – Axed? The Mystery of the Last Scandinavian King of York". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 181–208. ISBN978-0-9557720-1-6. ISSN2051-6509. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0. Woolf, A (2002). "Amlaíb Cuarán and the Gael, 941–81". In Duffy, S (ed.). Medieval Dublin. Vol. 3. Dublin: Four Courts Press. pp. 34–43.
McGuigan (2015b) p. 107; Wadden (2015) p. 27; Downham (2013b) p. 86; Woolf (2007a) p. 298. McGuigan, N (2015b). Neither Scotland nor England: Middle Britain, c.850–1150 (PhD thesis). University of St Andrews. hdl:10023/7829. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Downham, C (2013b). "Irish Chronicles as a Source for Rivalry Between Vikings, A.D. 795–1014". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 75–89. ISBN978-0-9557720-1-6. ISSN2051-6509. Woolf, A (2007a). From Pictland to Alba, 789–1070. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN978-0-7486-1233-8.
Wadden (2015) p. 28; Thornton (2001) p. 73. Wadden, P (2015). "The Normans and the Irish Sea World in the Era of the Battle of Clontarf". In McAlister, V; Barry, T (eds.). Space and Settlement in Medieval Ireland. Dublin: Four Courts Press. pp. 15–33. ISBN978-1-84682-500-2. Thornton, DE (2001). "Edgar and the Eight Kings, AD 973: Textus et Dramatis Personae". Early Medieval Europe. 10 (1): 49–79. doi:10.1111/1468-0254.00079. eISSN1468-0254. hdl:11693/24776. S2CID162915120.
Downham (2013b) p. 86; Sheehan (2010) p. 25; Downham (2007) pp. 54–55. Downham, C (2013b). "Irish Chronicles as a Source for Rivalry Between Vikings, A.D. 795–1014". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 75–89. ISBN978-0-9557720-1-6. ISSN2051-6509. Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0.
Downham (2014) p. 17; Sheehan (2010) p. 25; Sheehan; Stummann Hansen; Ó Corráin (2001) p. 112. Downham, C (2014). "Vikings' Settlements in Ireland Before 1014". In Sigurðsson, JV; Bolton, T (eds.). Celtic-Norse Relationships in the Irish Sea in the Middle Ages, 800–1200. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 1–21. ISBN978-90-04-25512-8. ISSN1569-1462. Sheehan, J (2010). "The Character and Cultural Context of the Inis Cáthaig/Scattery Island Silver Hoard". The Other Clare. 34: 23–28. hdl:10468/3285. Sheehan, J; Stummann Hansen, S; Ó Corráin, D (2001). "A Viking Age Maritime Haven: A Reassessment of the Island Settlement at Beginish, Co. Kerry". The Journal of Irish Archaeology. 10: 93–119. ISSN0268-537X. JSTOR30001672.
Downham (2007) p. 185; Woolf (2007a) p. 213; Woolf (2007b) p. 165. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0. Woolf, A (2007a). From Pictland to Alba, 789–1070. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN978-0-7486-1233-8. Woolf, A (2007b). "The Wood Beyond the World: Jämtland and the Norwegian Kings". In Smith, BB; Taylor, S; Williams, G (eds.). West Over Sea: Studies in Scandinavian Sea-Borne Expansion and Settlement Before 1300. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 153–166. ISBN978-90-04-15893-1. ISSN1569-1462.
Downham (2013a) pp. 202–203; Downham (2007) pp. 119–120. Downham, C (2013a). "Eric Bloodaxe – Axed? The Mystery of the Last Scandinavian King of York". No Horns on Their Helmets? Essays on the Insular Viking-Age. Celtic, Anglo-Saxon, and Scandinavian Studies. Aberdeen: Centre for Anglo-Saxon Studies and The Centre for Celtic Studies, University of Aberdeen. pp. 181–208. ISBN978-0-9557720-1-6. ISSN2051-6509. Downham, C (2007). Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014. Edinburgh: Dunedin Academic Press. ISBN978-1-903765-89-0.
Etchingham (2007) p. 158; Hudson (2005) p. 62; Etchingham (2001) p. 176. Etchingham, C (2007). "Viking-Age Gwynedd and Ireland: Political Relations". In Wooding, JM; Jankulak, K (eds.). Ireland and Wales in the Middle Ages. Dublin: Four Courts Press. pp. 149–167. ISBN978-1-85182-748-0. Hudson, BT (2005). Viking Pirates and Christian Princes: Dynasty, Religion, and Empire in the North Atlantic. Oxford: Oxford University Press. ISBN978-0-19-516237-0. Etchingham, C (2001). "North Wales, Ireland and the Isles: the Insular Viking Zone". Peritia. 15: 145–187. doi:10.1484/J.Peri.3.434. eISSN2034-6506. ISSN0332-1592.
Etchingham (2007) p. 157; Hudson (2005) p. 65; Etchingham (2001) pp. 173–175. Etchingham, C (2007). "Viking-Age Gwynedd and Ireland: Political Relations". In Wooding, JM; Jankulak, K (eds.). Ireland and Wales in the Middle Ages. Dublin: Four Courts Press. pp. 149–167. ISBN978-1-85182-748-0. Hudson, BT (2005). Viking Pirates and Christian Princes: Dynasty, Religion, and Empire in the North Atlantic. Oxford: Oxford University Press. ISBN978-0-19-516237-0. Etchingham, C (2001). "North Wales, Ireland and the Isles: the Insular Viking Zone". Peritia. 15: 145–187. doi:10.1484/J.Peri.3.434. eISSN2034-6506. ISSN0332-1592.
Woolf (2007a) pp. 219, 298–300; Woolf (2007b) pp. 164–165. Woolf, A (2007a). From Pictland to Alba, 789–1070. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN978-0-7486-1233-8. Woolf, A (2007b). "The Wood Beyond the World: Jämtland and the Norwegian Kings". In Smith, BB; Taylor, S; Williams, G (eds.). West Over Sea: Studies in Scandinavian Sea-Borne Expansion and Settlement Before 1300. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 153–166. ISBN978-90-04-15893-1. ISSN1569-1462.