References:

• Smith, V. C. & Pokorny, J. (1975)  Spectral sensitivity of the foveal cone photopigments between 400 and 500 nm. Vision Research, 15, 161-171.
• Stockman, A., Sharpe, L.T. (1999) Cone spectral snsitivities and color matching. In Color Vision from Genes to Perception (ed. Gegenfurtner, K.R. & Sharpe, L.T.), pp. 53-87.  Cambridge University Press, Cambridge, UK.
• International Telecommunication Union (2000) ITU-R  BT.709-4 PARAMETER  VALUES  FOR  THE  HDTV  STANDARDS  FOR  PRODUCTION AND  INTERNATIONAL  PROGRAMME  EXCHANGE
• International Telecommunication Union (1998) ITU-R  BT.1361 WORLDWIDE  UNIFIED  COLORIMETRY  AND  RELATED  CHARACTERISTICS OF  FUTURE  TELEVISION  AND  IMAGING  SYSTEMS