Thanh, Le Thi Hai, et al. “Influence Of Fabrication Condition on the Microstructural and Optical Properties of Lead-Free Ferroelectric Bi\(_{0.5}\)Na\(_{0.5}\)TiO\(_{3}\) Materials”. <i>Communications in Physics</i>, vol. 26, no. 1, July 2016, p. 51, doi:10.15625/0868-3166/26/1/7354.