Vlasovskih, N. S., S. K. Khamizov, R. K. Khamizov, A. N. Krachak, A. N. Gruzdeva, M. N. Tsikin, and V. V. Dolgov. “Extraction of Impurities: REM and Other Metals, from Phosphoric Acid”. Sorbtsionnye I Khromatograficheskie Protsessy, Vol. 13, no. 5, Nov. 2019, https://journals.vsu.ru/sorpchrom/article/view/1673.