Zyryanov, Vladimir V., and Sergey A. Petrov. “Transformation of Fluorite δ-Bi2O3 into a New Tetragonal Phase: Scientific Paper”. Journal of the Serbian Chemical Society 87, no. 12 (November 18, 2022): 1367–1380. Accessed April 29, 2024. https://www.shd-pub.org.rs/index.php/JSCS/article/view/11941.