1. Sources
2. Plautus:Trinummus(around 200 BC)
3. Plutarch:Life of CaesarinParallel Lives(2ndcentury BC)
4. Flavius Renatus Vegetius:Epitoma de re militari(ca. 387), trans. by N. P. Milner:Epitome of Military Science, 2nd ed. (Liverpool: University of Liverpool Press, 1996)
5. Ausonius:In Simulacrum Occasionis et Paenitentiae(4thCentury AD), English translation by Hugh Evely White, Loeb Classical Library (London: William Heinemann, 1921).