1. D. D. Nolte , Photorefractive Effects and Materials, Kluwer Academic Publishers, London, 1995
2. P. N. Prasad and D. J.Williams, Nonlinear Optical Effects in Molecules and Polymers, John Wiley and Sons Inc., New York, 1991
3. G. G. Roberts , Langmuir–Blodgett Films, Plenum Press, New York, 1990
4. A. Ullman , An Introduction to Ultrathin Organic Films from Langmuir–Blodgett to Self-Assembly, Academic Press, Boston, 1991
5. H. Kuhn and D.Möbius, in Investigations of Surfaces and Interfaces – Part B, eds. B. W. Rossiter and R. C. Baetzold, Wiley, New York, 1993, ch. 6