“Conditions for Reagent-Free (non-Exchange) Separation of Amino Acids Containing Mixtures on Anion Exchangers”. Sorbtsionnye I Khromatograficheskie Protsessy, vol. 19, no. 6, Dec. 2019, pp. 711-7, https://doi.org/10.17308/sorpchrom.2019.19/2233.