1. Interaction between rod and cone signals studied with temporal sine wave stimulation;van den Berg;Journal of the Optical Society of America,1977
2. Light as a true visual quantity: Principles of measurement;CIE,1978
3. Mesopic photometry: History, special problems and practical solutions;CIE,1989
4. CIE 1988 2° spectral luminous efficiency function for photopic vision;CIE,1990
5. Towards general systems of colorimetry based on the tetrachromatic colour match;Clarke,1976