References

1.    H. A. Macleod, Thin Film Optical Filters, 2nd edition, c. 1989, McGraw-Hill.
       (out of print, but may be located by amazon.com)

2.    P. Baumeister, "Optical Coating Technology", Lecture Notes, UCLA Short Course,
       1988.

3.  J.D. Traylor Kruschwitz, W.T. Pawlewicz, "Optical and Durability Properties of
        Infrared Transmitting Thin Films,"Appl. Opt. 36, No. 10, April 1997.