Bontas, Andrei. “Constantine’s Decennalia and His Fourth Consulship on a Follis from Lugdunum”. KOINON: The International Journal of Classical Numismatic Studies 3 (January 1, 2020): 77–82. Accessed December 29, 2025. https://www.archaeopresspublishing.com/ojs/index.php/koinon/article/view/1133.