1. Further Studies on Acquired Deficiency of Color Discrimination*
2. Pokorny, J., Smith, V.C., Verriest, G., and Pinckers, A.J.L.G. (1979). [Congenital and Acquired Color Vision Defects] New York: Grune & Stratton.
3. Visual Psychophysics
4. Computerized simulation of color appearance for dichromats
5. Newton, I., [Optics] (1730), Dover 1952