1. Trends in the development of radiometry;Geist;Opt. Eng.,1976
2. Radiation standards
3. Harvey, J. E. (1976). Light scattering characteristics of optical surfaces, Ph.D. Dissertation, University of Arizona Tuscon.
4. Terminology in photometry and radiometry;Jones;J. Opt. Soc. Am.,1963
5. Terms, Definitions, and Symbols in Reflectometry