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Yao, Fang-Zhou; Wang, Ke; Jo, Wook; Lee, Jae-Shin; Li, Jing-Feng . (2014). Effect of poling temperature on piezoelectricity of CaZrO3-modified (K, Na)NbO3-based lead-free ceramics. Journal of Applied Physics, 116(11), 114102–. doi:10.1063/1.4895774 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research