1.
2. Nonlinear Optics of Organic Molecules and Polymers(Eds.: H. S. Nalwa S. Miyata) CRC Press Boca Raton FL 1997.
3. Molecular Nonlinear Optics(Ed.: J. Zyss) Academic Press New York 1994.
4. N. P. Prasad D. J. Williams Introduction to Nonlinear Optical Effects in Molecules and Polymers John Wiley & Sons New York 1991.
5. For recent general reviews on NLO studies involving organic chromophores see for example: