Dawczyk, Maciej. Lombard-Byzantine Political Relations from the Beginning of the 6th Century to the Fall of the Exarchate of Ravenna: No. XLVI. Byzantina Lodziensia. Poland: Lodz University Press, 2024. Accessed January 21, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/998.