Bronnen, noten en/of referenties
- ↑ John V. A. Fine Jr. (1991). The Early Medieval Balkans: A Critical Survey from the Sixth to the Late Twelfth Century, p. 197. ISBN 0-472-08149-7.
- ↑ Reuter, Timothy (1992). The New Cambridge Medieval History, p. 259. Volume III. ISBN 978-0-521-36447-8.
- ↑ Wangerin, Laura (2019). Kingship and Justice in the Ottonian Empire, p. 16. ISBN 978-0-472-13139-6.
- ↑ Kennedy, Hugh (1996). Muslim Spain and Portugal: A Political History of Al-Aandalus, p. 342. Longman. ISBN 978-0582495159.
- ↑ Reuter, Timothy (2013). Germany in the Early Middle Ages, c. 800–1056, p. 260. ISBN 978-0-582-49034-5.
- ↑ Theis, Laurent (1990). "Nouvelle histoire de la France médiévale". L'Héritage des Charles: De la mort de Charlemagne aux environs de l'an mil –Points. Histoire (in French). ISBN 978-2-02-011553-7.
- ↑ Lund, Niels (2001). "The Danish Empire and the End of the Viking Age". The Oxford Illustrated History of the Vikings, p. 167. Oxford University Press. ISBN 0192854348.
- ↑ Roach, Levi (2016). Æthelred the Unready, pp. 317–318. New Haven, Connecticut: Yale University Press. ISBN 978-0-300-22972-1.
- ↑ Ní Mhaonaigh, Máire (2007). Brian Boru, Ireland's greatest king?, p. 31. Stroud: Tempus. ISBN 978-0-7524-2921-2.
- ↑ Douglas, David C. (1964). William the Conqueror: The Norman Impact Upon England, p. 418. University of California Press. ISBN 978-0-520-00348-4.
- ↑ Gerd Althoff (2003). Otto III (translated by Phyllis G. Jestice), pp. 124–125. Pennsylvania University Press. ISBN 0-271-02232-9.