1. D.S. Chemla, J. Zyss (eds.), Nonlinear optical properties of organic molecules and crystals (Academic Press, NewYork, 1987)
2. H.S. Nalwa, S. Miyata, Nonlinear optics for organic molecules and polymers (CRC Press, Newyork, 1997)
3. P.N. Prasad, D.J. Williams, Introduction to non linear optical effects in organic molecules and polymers (Wiley, Newyork, 1991)
4. R.W. Boyd, Non linear optics (Academic Press, San Diego, 1992), p. 155
5. B.E. Salch, M.C. Teich, Fundamentals of photonics (Wiley, New York, 1991), p. 113