Makrlík, Emanuel, and Petr Vaňura. “Calcium Ionophore I As Very Effective Extraction Agent for Trivalent Europium and Americium”. Journal of the Serbian Chemical Society 84, no. 2 (March 8, 2019): 199–209. Accessed April 20, 2024. https://www.shd-pub.org.rs/index.php/JSCS/article/view/6595.