1. N. V. Sidorov, T. R. Volk, B. N. Mavrin, and V. T. Kalinnikov, Lithium Niobate: Defects, Photorefraction, Vibrational Spectrum and Polaritons (Nauka, Moscow, 2003) [in Russian].
2. T. Volk and M. Wohlecke, Lithium niobate. Defects, Photorefraction and Ferroelectric Switching (Springer, Berlin, 2008).
3. P. Gunter and J. P. Huignard, Photorefractive Materials and Their Applications (Springer, Berlin, 2007).
4. V. A. Maksimenko, A. V. Syui, and Yu. M. Karpets, Photoinduced Processes in Lithium Niobate Crystals (Fizmatlit, Moscow, 2008) [in Russian].
5. Yu. S. Kuz’minov, Electrooptical and Nonlinear Optical Lithium Niobate Crystal (Nauka, Moscow, 1987) [in Russian].