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2. D. Marcuse, ?Theory of Dielectric Optical Waveguides? (Academic Press, New York, 1974).
3. H. G. Unger, ?Planar Optical Waveguides and Fibres? (Oxford University Press, Oxford, 1977).
4. P. J. B. Clarricoats (ed.) ?Optical Fibre Waveguides?, (Peter Peregrinus Ltd, on behalf of IEE, Stevenage, 1980).
5. M. J. Adams, ?An Introduction to Optical Waveguides?, (Wiley, New York, 1981).