1. Assorted quotes from: Polybius (Greek, c. 200-118 BC) Universal History; Livy (Roman, 59 BC-17 AD) History of Rome from its Foundation; Plutarch (Greek, c. 45-120 AD) Parallel Lives: Marcellus
2. E. J. Dijksterhuis: Archimedes, translated by C. Dikshoorn, Princeton University Press, 1956
3. Vitruvius: De Architectura (as quoted by Dijksterhuis and others)
4. Athenaeus: Deipnosophists, Book 5,
http://www.attalus.org/old/athenaeus5b.html#c40
5. Ph. Fleury, La mécanique de Vitruve, Caen, Presses Universitaires de Caen, 1993, p. 113