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3. A. Yariv, P. Yeh, Optical Waves in Crystals (Addison-Wesley, New York, 1984).
4. L. M. Brekhovskikh, Waves in Layered Media (Academic Press, New York, 1980).
5. Surface Polaritons, V. M. Agranovich and D. L. Mills eds. (North Holland, 1982).