Ohnsorge, Werner (1947): Das Zweikaiserproblem im früheren Mittelalter. Die Bedeutung des byzantinischen Reiches für die Entwicklung der Staatsidee in Europa, Hildesheim, August Lax Verlagsbuchhandlung, s. 15–31. Oversatt i Sullivan, Richard E. (1959): The Coronation of Charlemagne, D. C. Heath and Company, Boston, Library of Congress Catalog Card Number: 59-14499". Clc-library-org-docs.angelfire.com
Hoche, Dominique T (2012): «Charlemagne» i: Matheson, Lister M.: Icons of the Middle Ages: Rulers, Writers, Rebels, and Saints. Santa Barbara, California: Greenwood, ISBN 978-0-313-34080-2, s. 143–174, særskilt 172
Durant, Will: "King Charlemagne", History of Civilization, Vol III, The Age of Faith. Online version in the Knighthood, Tournaments & Chivalry Resource Library, red. Brian R. Price. Arkivert fra originalen den 24. desember 2011 hos Wayback Machine.
Ruhli, F.J.; Blumich, B.; Henneberg, M. (2010): «Charlemagne was very tall, but not robust», Economics and Human Biology8, s. 289–290. doi:10.1016/j.ehb.2009.12.005.
Mediaeval Sourcebook: Capitulary for the JewsArkivert 14. august 2014 hos Wayback Machine., avledet fra Migne, J.P., red. (1862): Patrologiae Cursus Completus, Paris, Vol. XCVII, s. 369-370.
Fraley, Michael (1993): Arthur the Conqeror. Sitat: «To anyone familiar with the early Medieval Period of European history, Geoffrey's story begins to sound familiar here. It should. It seems to be based, in large part, on the historical adventures of Charlemagne, the Frankish King of the Ninth Century, who eventually became Emperor. Looking at Charlemagne's life and personality, it becomes clear that he and Geoffrey's Arthur are practically twins.»
Mann, Horace (1910): «Pope St. Leo III», The Catholic Encyclopedia, 9. New York: Robert Appleton Company
Shahan, Thomas; Macpherson, Ewan: "Charlemagne", The Catholic Encyclopedia. Sitat: «In some parts of the empire popular affection placed him among the saints. For political purposes and to please Frederick Barbarossa he was canonised (1165) by the antipope Paschal III, but this act was never ratified by insertion of his feast in the Roman Breviary or by the Universal Church; his cultus, however, was permitted at Aachen [Acta SS., 28 Jan., 3d ed., II, 490–93, 303–7, 769; his office is in Canisius, Antiq. Lect., III (2)]»
nkp.cz
aleph.nkp.cz
Tsjekkias nasjonale autoritetsdatabase, NKC-identifikator jo20000082682, besøkt 23. november 2019[Hentet fra Wikidata]
Selv om hun er vanligvis referert til som Desiderata er det teoretisert at navnet er avledet fra en skrivefeil i en kopi fra 1800-tallet av Monumenta Germaniae Historica hvor en stor D i desideratam filiam (latin for «ønsket datter») og denne feilen ble sammensatt fra en språklig tilbakedannelse til Desideria, et mer sannsynlig navn (en hunkjønnsform av Desiderius, farens navn), eller oversatt (som til fransk, Désirée). På italiensk foretrekkes varianten Ermengarda, jf. Bertolini, Ottorini: «Ermengarda», Treccani.it.
Mediaeval Sourcebook: Capitulary for the JewsArkivert 14. august 2014 hos Wayback Machine., avledet fra Migne, J.P., red. (1862): Patrologiae Cursus Completus, Paris, Vol. XCVII, s. 369-370.
«Early Dark Ages III (755 - 840)»Arkivert 3. november 2013 hos Wayback Machine., Worldology 25 April 2013. Sitat: «Charlemagne created a peaceful environment for Jews in his kingdom. Charlemagne fostered a system where the Christian majority could procure credit through Jewish constituents. Christians were forbidden to loan money at an interest rate, a restriction not shared by the Jews».
Durant, Will: "King Charlemagne", History of Civilization, Vol III, The Age of Faith. Online version in the Knighthood, Tournaments & Chivalry Resource Library, red. Brian R. Price. Arkivert fra originalen den 24. desember 2011 hos Wayback Machine.
Tomac, Petar (1959): Vojna istorija, Beograd: Vojnoizdavački zavod JNA. LCCN 60039538. OCLC 21319446, s. 304
worldology.com
«Early Dark Ages III (755 - 840)»Arkivert 3. november 2013 hos Wayback Machine., Worldology 25 April 2013. Sitat: «Charlemagne created a peaceful environment for Jews in his kingdom. Charlemagne fostered a system where the Christian majority could procure credit through Jewish constituents. Christians were forbidden to loan money at an interest rate, a restriction not shared by the Jews».