1. Nonlinear Optical Properties of Molecules and Crystals, ed. D. S. Chemla and J. Zyss, Academic Press, Orlando, FL, 1987.
2. Materials for Nonlinear Optics: Chemical Perspectives, ed. S. R. Marder, M. E. Sohn and G. D. Stuky, ACS Symp. Ser., 455, American Chemical Society, Washington, DC, 1991.
3. Synthesis and structure of (cis)-[1-ferrocenyl-2-(4-nitrophenyl)ethylene], an organotransition metal compound with a large second-order optical nonlinearity
4. Organometallic salts with large second-harmonic-generation powder efficiencies: (E)-1-ferrocenyl-2-(1-methyl-4-pyridiniumyl)ethylene salts
5. F. Meyers and J-L.Bredas, in Organic Materials for Non-linear Optics III, ed. G. J. Ashwell and D. Bloor, Royal Society of Chemistry, Cambridge, 1993, p. 1.