[1]           K. Okamoto, Fundamentals of Optical Waveguides, (Academic Press, San Diego, 2000). [2]           C. Tsao, Optical Fibre Waveguide Analysis, (Oxford University Press, 1992), Part III

[3]           C. Yeh and G. Lindgren, “Computing the propagation characteristics of radially stratified fibers: an efficient method”, Applied Optics 16(2) p483-493 (1977)

[4]           J. Chilwell and I. Hodgkinson, “Thin-films field-transfer matrix theory of planar multilayer waveguides and reflection from prism-loaded waveguide”, Journal of the Optical Society of America A, 1 p742-753 (1984)