Firsov, A. V., A. V. Artamonov, D. N. Smirnova, A. P. Ilyin, and S. P. Kochetkov. “SORPTION OF RARE-EARTH METALS FROM NO EVAPORATED DIHYDRATE PHOSPHORIC ACID ON MACROPOROUS STRONGLY ACIDIC CATIONITE”. ChemChemTech, Vol. 59, no. 4, July 2018, pp. 50-54, doi:10.6060/tcct.20165904.5321.