↑James Arnold Higginbotham: Piscinae: artificial fishponds in Roman Italy (University of North Carolina Press, 1997), p. 247, note 44 online; Cynthia J. Bannon, "Servitudes for Water Use in the Roman Suburbium," Historia 50 (2001), pp. 47–50. For more on these early efforts, see Sergius Orata.