1. P. Günter, J.-P. Huignard (Eds.): Photorefractive Materials and Their Applications I+II, Topics Appl. Phys., Vol. 61 and 62, Springer-Verlag, Berlin (1998).
2. M.P. Petrov, S.I. Stepanov, A. Khomenko (Eds.): Photorefractive Crystals in Coherent Optical Systems, Springer-Verlag, Berlin (1991).
3. An older but excellent review of this topic can be found in V.E. Wood, P.J. Cressman, R.L. Holman, C.M. Verber: in Photorefractive Materials and Their Applications II, P. Günter, J.-P. Huignard (Eds.), Topics Appl. Phys., Vol. 62, Springer-Verlag, Berlin (1988).
4. D. Kip: Appl. Phys. B 67, 131 (1988).
5. A.M. Prokhorov, Y.S. Kuzminov: Ferroelectric Thin-Film Waveguides in Integrated Optics, Cambridge International Science, Cambridge (1996).