“Acid Retardation Method of Separation for Closed-Circuit Processing of Alumina-Containing Raw Materials With the Use of Salt-Acid Digestion”. Sorbtsionnye I Khromatograficheskie Protsessy, vol. 17, no. 6, Feb. 2018, pp. 877-85, https://doi.org/10.17308/sorpchrom.2017.17/448.