References
- D. L. DiLaura, “On the Computation of Equivalent Sphere Illumination,” Journal of the IES, Vol. 4, No. 2, January 1975, p. 129.
- R. E. Levin, “The Photometric Connection,” Lighting Design & Applications, Vol. 12; Part I, September 1982, p. 28; Part II, October 1982, p. 60; Part III, November 1982, p. 42; Part IV, December 1982, p. 16.
- H. Akima, “A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures,” Journal of the Association for Computing Machines, Vol. 17, 1970, p. 589.