A.D.)." De Imperatoribus Romanis (2001a). Accessed 16 February 2008. Leadbetter, William. "Numerianus (283–284 A.D.)." De Imperatoribus Romanis (2001b). Accessed 16 February 2008. Leadbetter, William. "Carinus (283–285 A.D.)." De Imperatoribus Romanis (2001c). Accessed 16 February 2008. Mathisen, Ralph W. "Diocletian (284–305 A.D.)." De Imperatoribus Romanis (1997). Accessed 16 February 2008. Potter, David S. The Roman Empire at Bay: AD 180–395. New York: Routledge, 2005. Hardcover Paperback Southern, Pat. The Roman Empire from Severus to Constantine. New York: Routledge, 2001. Williams, Stephen. Diocletian and the Roman Recovery. New York: Routledge, 1997. External links Leadbetter, William. "Numerianus (283–284 A.D.)", DIR (2001). 284 deaths 3rd-century Roman emperors 3rd-century murdered monarchs Imperial Roman consuls Roman emperors murdered by the Praetorian Guard Crisis of the Third Century Deified Roman emperors Year of birth missing Aurelii People of the Roman–Sasanian Wars Sons of Roman emperors Caran dynasty