Baltabekova Zh.A., Kenzhaliyev B.K., Lokhova N.G. “Sorption Extraction of Rare-Earth Elements and Iron from Acid Solutions”. International Journal of Advanced Science and Technology 29, no. 04 (June 6, 2020): 2539 - 2550. Accessed April 27, 2024. http://sersc.org/journals/index.php/IJAST/article/view/21098.