Gw mau tau Lihat juga dari Tetrakromasi

Thompson, Evan (2000). "Comparative color vision: Quality space and visual ecology." In Steven Davis (Ed.), Color Perception: Philosophical, Psychological, Artistic and Computational Perspectives, pp. 163–186. Oxford: Oxford University Press.

Holba, Á.; Lukács, B. "On tetrachromacy"

Looking for Madam Tetrachromat  By Glenn Zorpette. Red Herring magazine, 1 November 2000