1. (a) J. Zyss (Ed.), Molecular Nonlinear Optics, Academic Press, New York, 1994.
2. (b) J. Zyss (Ed.), Molecular Nonlinear Optics: Materials, Physics and Devices, Academic Press, Boston, 1993.
3. (c) G.H. Wagnière, Linear and Nonlinear Optical Properties of Molecules, VCH Weinheim/Helvetica Chimica Acta, Basel, 1993.
4. (d) S.R. Marder, J.E. Sohn, G.D. Stucky (Eds.), Materials for Nonlinear Optics: Chemical Perspectives, ACS Symp. Ser. 455, American Chemical Society, Washington, DC, 1991.
5. For recent reviews, see (a) T.J. Marks, M.A. Ratner, Angew. Chem., Int. Ed. Engl. 34 (1995) 155.