1. H. Rouse and S. Ince, History of Hydraulics (Dover Publications, New York, 1957), pp. ix—xi.
2. A. T. Hodge, Future Currents in Aqueduct Studies (Francis Cairns, Leeds, 1991) pp. 167–68.
3. M. J. T. Lewis, 'Theoretical Hydraulics, Automata, and Water Clocks', in O. Wikander, Handbook of Ancient Water Technology (Brill, Leiden, 2000), pp. 343–69.
4. The most famous collection is that of Hero of Alexandria; see The Pneumatics of Hero of Alexandria, ed. Marie B. Hall (Macdonald, London, 1971).