GUIZOT, François. General History of Civilization in Europe: From the Fall of the Roman Empire to the French Revolution. [s.l.]: D. Appleton, 1882. 316 s. Dostupné online. S. 30. (anglicky)
RIVER, Charles. The Burgundians: The History of the Early Kingdoms of Burgundy in the Middle Ages. [s.l.]: Independently Published Dostupné online. ISBN979-8-7119-4768-4. (anglicky)
