Birley, Anthony R. “The Last Books of Cassius Dio (on A. G. Scott, Emperors and Usurpers: An Historical Commentary on Cassius Dio’s Roman History Books 79(78)–80(80) (A.D. 217–229))”. Histos 14 (July 1, 2020). Accessed September 27, 2024. https://histos.org/index.php/histos/article/view/454.