References
Hornblower, S. and Spawforth, A. (2005) The Oxford Classical Dictionary [Online], Oxford, Oxford University Press, Available at Oxford Reference (Accessed 3 March 2016).
Chorlton, D. and Whitney, K. (2016) Grove Music Online [Online], Oxford, Oxford University Press, Available at http://www.oxfordmusiconline.com/subscriber/article/grove/music/25241 (Accessed 3 March 2016).