1. 2R. Haitz, F. Kish, J. Tsao, and J. Nelson , "The Case for a National Research Program on Semiconductor Lighting "; Sandia Nationals Labs, http://www.sandia.gov/lighting/lightingdocs/hpsnl_long.pdf, as on January 23, 2007.
2. 3Commission Internationale de l'Eclairage, Method of Measuring and Specifying Colour Rendering Properties of Light Sources. Vienna, CIE Central Bureau, 1974, CIE 13.2-1974.
3. The Blue Laser Diode
4. 5S. Nakamura, S. Pearton, and G. Fasol , The Blue Laser Diode: The Complete Story , 2nd edition , p. 230 . Springer, New York, 2000 .