1. Nonlinear Optics;Bloembergen,1965
2. The Principles of Nonlinear Optics;Shen,1984
3. Introduction to Nonlinear Laser Spectroscopy;Levenson,1982
4. Nonlinear Optics of Free Atoms and Molecules;Hanna,1979
5. Optical third harmonic generation in gases by a focused laser beam;Ward;Phys. Rev.,1969