1. K. Rajneesh, S. Pal, and B. K. Das, Proceedings of the International Conference on Optics and Photonics (ICOP-2009), Paper D1.
2. Yu. N. Korkishko and V. A. Fedorov, Ion Exchange in Single Crystals for Integrated Optics and Optoelectronics (Cambridge International Science Publ., Cambridge, 1999), pp. 106–148.
3. James E. Toney, Lithium Niobate Photonics (Artech House, Norwood, MA, 2015), p. 288.
4. I. V. Il’ichev, N. V. Toguzov, and A. V. Shamray, Tech. Phys. Lett. 35 (9), 831 (2009).
5. Integrated Optics, Ed. by T. Tamir (Springer, Heidelberg, 1975; Mir, Moscow, 1978).