Prime colors and color imaging. - Michael H. Brill; Graham D. Finlayson; Paul M. Hubel; William A. Thornton (CIC, 1998)

Color-imaging primaries and gamut as prescribed by the human visual system. - William A. Thornton; William N. Hale (Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts, 2000)

The Prime Colors of Human Vision: Their Prescription for Illumination, Color Printing, Color Photography, Color Television, and Visual Clarity. - William A. Thornton (CGIV, 2002)