1. C.L. Robbins, Daylighting Design and Analysis. VNR, New-York (1986)
2. S.R. Bandyopadhyay and B. Ray. Proe. 23rd CIE conference, 1, 275 (1995)
3. C. Suvagau, C. Bianchi and H.W. Bodmann, Proc. 23rd CIE Conference, 1, 221 (1995).
4. M.F. Cohen. D.P. Grecnbcrg, D.S. Immel and P.J. Brock, IEEE CG&A, March 26 (1986)
5. P. J. Littlefair, Lighting Research and Technology. 23, 175 (1991)