1. Bachmann A (1925) An encyclopedia of the violin. New York: D. Appleton and Company.
2. Woodfield I (1988) The early history of the viol. Cambridge: Cambridge University Press.
3. Jones SS (1995) The Lira da Braccio. Bloomington: Indiana University Press.
4. A history of violin research;CM Hutchins;J Acoust Soc Am,1983
5. The mechanical action of violins;FA Saunders;J Acoust Soc Am,1937