Пипин. Thorpe, Lewis (Translator), Two Lives of Charlemagne, p.5 Chamberlin, Russell, The Emperor Charlemagne, p.44 Riché, Pierre, The Carolingians, p.85
Comyn, Robert. History of the Western Empire, from its Restoration by Charlemagne to the Accession of Charles V, Vol. I. 1851 Kreutz, Barbara (1996). Before
Комин, Роберт. History of the Western Empire, from its Restoration by Charlemagne to the Accession of Charles V, Том I 1851 година Брис, Џејмс, The Holy
Карло Велики (лат. Carolus Magnus, герм. Karl der Große, фр. Charlemagne; 2 април 742 - 28 јануари 814) — франкиски крал и цар на Светото Римско Царство
Saint-Bertin, 880, p. 221. Laurent Theis, L'Héritage des Charles de la mort de Charlemagne aux environs de l'an mil, 1990, p. 115 BnF - Jean Fouquet [архива]. Mémoires