References for: Euclid's definitions
- L Russo, The forgotten revolution : How science was born in 300BC and why it had to be reborn (Springer, Berlin, New York, London, 2004).
- W R Knorr, 'Arithmêtikê stoicheiôsis' : on Diophantus and Hero of Alexandria, Historia Math. 20 (2) (1993), 180-192.
JOC/EFR December 2005
MacTutor History of Mathematics