1. K. Shimazaki, S. Tachikava, and A. Ohishi, in: Proc. 7th Int. Symp. on Materials in Space Environment, Toulouse, France (1997), p. ESA SP-399.
2. L. Zhang, W. L. Zhong, C. L. Wand, et al., Eur. Phys., 11, 565–573 (1999).
3. T. Genchu, Y. Yun, C. Yunzhen, and C. Wei, Solar Energy Mater. Solar Cells, 92, 1298–1301 (2008).
4. T. Genchu, Y. Yun, C. Wei, and C. Yunzhen, Mater. Lett., 62, 2914–2916 (2008).
5. B. Yaffe, U. Cook, and G. Yaffe, Piezoelectric Ceramics [Russian translation], Mir, Moscow (1974).