1. Kapany, N. S. and Burke, J. J. (1972) Optical Waveguides, Academic Press, New York, chap. 7.
2. Snyder, A. W. and Menzel, R. (eds) (1975) Photoreceptor Optics, Springer-Verlag, Berlin, p. 50.
3. Snyder, A. W. (1979) Handbook of Sensory Physiology, Vol. VII/6A (ed. K. Autrum), Springer-Verlag, Berlin, pp. 279–81.
4. Snyder, A. W. (1972) Coupled-mode theory for optical fibers. J. Opt. Soc. Am., 62, 1267–77.
5. McIntyre, P. and Snyder, A. W. (1973) Power transfer between optical fibers. J. Opt. Soc. Am., 63, 1518–27.