1. Nonlinear Optical Properties of Organic and Polymeric Materials;Williams,1983
2. Nonlinear Optical Properties of Organic Molecules and Crystals;Chemla,1987
3. Organic Materials for Nonlinear Optics,1989
4. Generation of optical harmonics;Franken;J. Phys. Rev. Lett.,1961
5. For a recent review, see D. N. Nikogosyan; Nonlinear Optical Crystals: A Complete Survey, Springer, Berlin, 2005.