References
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- Martin L.C. 1932. An Introduction to Applied Optics, Volume II. Pitman: London. The general issue of light concentration by optical systems is discussed in W. T. Welford and R. Winston, The optics of Nonimaging Concentrators (Academic, New York, 1978). Any reader who knows of yet another textbook or article that derives or explains the theorem about image luminance, is requested to contact the author.
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- Jenkins F.A. and White H.E. 1957. Fundamentals of Optics, Third Edition. McGraw-Hill: New York.
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