1. D. S. Chemla and J. Zyss (eds.),Nonlinear Optical Properties of Organic Molecules and Crystals, Academic Press, Orlando (1991).
2. J. Simon and J.-J. Andre,Molecular Semiconductors. Photoelectrical Properties and Solar Cells, Springer, Berlin (1985).
3. M. Pope and Ch. E. Svenberg,Electronic Processes in Organic Crystals, Oxford University Press, New York (1982).
4. S. Larsson and A. Volosov,J. Chem. Phys.,85, No. 5, 2548–2554 (1986).
5. J. R. Reimers and N. S. Hush,Chem. Phys.,134, 323–354 (1989).