1. V. G. Dmitriev and L. V. Tarasov, Applied Nonlinear Optics (Fizmatlit, Moscow, 2004) [in Russian].
2. S. A. Akhmanov and S. Yu. Nikitin, Physical Optics (Izd-vo MGU, Moscow, 2004) [in Russian].
3. V. V. Antipov, A. A. Blistanov, N. G. Sorokin, and S. I. Chizhikov, Kristallografiya 30(4), 734 (1985) [Sov. Phys. Crystallogr. 30 (4), 428 (1985)].
4. H. Ito, C. Takyu, and H. Inaba, Electron. Lett. 27(14), 1221 (1991).
5. G. A. Magel, M. M. Fejer, and R. L. Byer, Appl. Phys. Lett. 56(2), 108 (1990).