1. J. F. Nye, Physical Properties of Crystals. Oxford: Oxford Clarendon Press, 1957, Chap. 1, 8.
2. A. Yariv, Optical Electronics, 3rd ed. Tokyo: Holt-Saunders, 1985, Chap. 13.
3. T. L. Koch, and U. Koren, “Semiconductor Lasers for Coherent Optical Fibre Communications”. IEEE J. Lightwave Technol, vol. 8, pp. 274–293, 1990.
4. G. I. Stegeman, and C. T. Seaton, “Nonlinear integrated optics”, J. Appl. Phys., Vol. 58, pp. R57–R78, 1985.
5. M. Shah, J. D. Crow, and S. Wang, “Optical-Waveguide Mode-Conversion Experiments”, Appl. Phys. Lett. vol. 20, pp. 66–69, 1972.