DEACON, Paul the. History of the Langobards. [s.l.]: Dalcassian Publishing Company Dostupné online. S. 417. (anglicky)
Transactions, American Philosophical Society (vol. 72, Part 4, 1982). [s.l.]: American Philosophical Society Dostupné online. ISBN978-1-4223-7473-3. S. 11. (anglicky)
The Cambridge Medieval History volumes 1-5. [s.l.]: Plantagenet Publishing Dostupné online. (anglicky)
HODGKIN, Thomas. Italy and Her Invaders: The Lombard kingdom, 600-744. [s.l.]: Jacobi Press 323 s. Dostupné online. S. 50. (anglicky)
thule-italia.org
PAULUS DIACONUS; FOULKE, William Dudley. History of the Langobards, Book 6.. University of Pennsylvania: [s.n.], 1907. Dostupné online. Kapitola XXVIII.. (anglicky)
PAULUS DIACONUS; FOULKE, William Dudley. History of the Langobards, Book 6.. University of Pennsylvania: [s.n.], 1907. Dostupné online. Kapitola XXXV.. (anglicky)