1. Blaker, JW and Schaeffer, P. 2000.Optics: an introduction for technicians and technologists, 43–70. Upper Saddle River, NJ, USA: Prentice Hall.
2. Chen, CW and Gossett, EW. 1997.Grism (grating-prism combination).United States Patent 5,652,681, 29 July
3. Considine, DM. 2009.Diffraction grating. Grolier multimedia encyclopedia.Available from:http://gme.grolier.com/cgi-bin/article?assetid=0085400-0. [Accessed date July 17, 2009]