Yin, Qiyi, Ming Ding, Changan Tian, Hongdian Lu, Jihai Cheng, and Yingying Zhou. 2012. “Piezoelectric and Ferroelectric Properties of (Bi0.5Na0.5)0.9Ba0.07Sr0.03TiO3 Lead-Free Ceramics With MnO2 Doping”. Asian Journal of Chemistry 24 (9):4095-97. https://asianpubs.org/index.php/ajchem/article/view/9556.