* Bowman, Alan K. The Cambridge Ancient History: The High Empire, A. D. 70 – 192.
* Bowman, Alan K., The Cambridge Ancient History: The Crisis of Empire, A. D. 193-337, Cambridge University Press, 2005
* Bowman, Alan K., The Cambridge Ancient History: The Crisis of Empire, A. D. 193-337, Cambridge University Press, 2005
* Bowman, Alan K. The Cambridge Ancient History: The Crisis of Empire, A. D. 193 – 337.
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