1. The Principles of Nonlinear Optics;Shen,1984
2. Nonlinear Optics;Boyd,1992
3. Classical Electrodynamics;Jackson,1975
4. Generation of optical harmonics;Franken;Phys. Rev. Lett.,1961
5. Optical harmonic generation in calcite;Terhune;Phys. Rev. Lett.,1962