1. The Measurement of Gloss
2. ASTM D523. Standard test method for specular gloss. American Society for Testing and Materials; 1999.
3. Psychophysics. New York: John Wiley & Sons; 1975.
4. Cesia: A system of visual signs complementing color
5. Semiotics and cesia: meanings of the spatial distribution of light. In: editor. Colour and psychology. From AIC Interim Meeting 96, Gothenburg. Stockholm: Scandinavian Colour Institute, Colour Report F50; 1997; p 136–140.