1. International Lighting Vocabulary, 3rd Edition. Publication CIE No. 17 (El.l), Bureau Central de la CIE, Paris, France (1970).
2. G.J. Kneissl and J.C. Richmond, “A Laser-Source Integrating Sphere Reflectometer,” NBS Tech. Note 439 (February 1968) Appendix B gives a derivation of Kirchhoff s Law.
3. M. Jakob, Heat Transfer, Vol. 1, John Wiley and Sons, New York (1949), pp. 43–51.
4. F.E. Nicodemus, J.C. Richmond, J.J. Hsia, I.W. Ginsberg, and T. Limperis, “Geometrical Considerations and Nomenclature for Reflectance,” NBS Monograph 160 (October 1977).
5. R.V. Dunkle, “Spectral Reflectance Measurements,” in Surface Effects on Spacecraft Materials (F.J. Clauss, Ed.), Wiley, New York (1960), pp. 117–137.