1. A. Ghatak, K. Thyagarajan: Introduction to Fiber Optics (Cambridge Univ. Press, Cambridge 1998)
2. A.W. Snyder, J.D. Love: Optical Waveguide Theory (Chapman Hall, London 1983)
3. B.E.A. Saleh, M.C. Teich: Fundamentals of Photonics, 2nd edn. (Wiley, Chichester 2007)
4. D. Gloge: Weakly guiding fibers, Appl. Opt. 10(10), 2252 (1971)
5. C. Vassallo: Optical Waveguide Concepts (Elsevier, Amsterdam 1991)