Lenski, N. E. (2002). Failure of empire: Valens and the Roman state in the fourth century A.D. University of California Press.

Lenski, Noel Emmanuel. Failure of Empire: Valens and the Roman State in the Fourth Century A.D. Berkeley: University of California Press, 2002.

Lenski, Noel Emmanuel. Failure of Empire: Valens and the Roman State in the Fourth Century A.D. University of California Press, 2002.