Vitruvius, X.4.1, 5.1 and 2 Arthur W. Parsons, A Roman Water Mill in the Athenian Agora, Hesperia 5, 1936, pp. 70-90 R.J. Spain, The Roman Watermill in the Athenian Agora: a New View of the Evidence, Hesperia 56, 1987, pp. 335-353 T.S. Reynolds, Stronger than a Hundred Men, Baltimore 1983, esp. pp. 36-38 Arthur W. Parsons, A Roman Water Mill in the Athenian Agora, Hesperia 5, 1936, p. 88