1. D. A. Pinnow: IEEE J. QE-6, 223 (1970)
2. J.M. Hammer: “Modulation and Switching of Light in Dielectric Waveguides” in Integrated Optics, 2nd ed., ed. by T. Tamir, Topics Appl. Phys., Vol. 7, (Springer, Berlin, Heidelberg, New York 1979) p. 142
3. See, for example, A. Yariv: Introduction to Optical Electronics, 2nd ed., (Holt, Rine-hart, Winston, New York 1976) pp. 246–253
4. See, for example, J.F. Nye: Physical Properties of Crystals (Oxford, New York 1957) p. 123
5. S. Namba: J. Opt. Soc. Am. 51, 76 (1961)