Nechaeva, Ludmila S., Elena V. Butyrskaya, Vladimir A. Shaposhnik, and Vladimir F. Selemenev. “Standardless Molecular Spectral Analysis of Cation-Exchangers”. Sorbtsionnye i Khromatograficheskie Protsessy 10, no. 5 (November 28, 2019). Accessed December 5, 2025. https://journals.vsu.ru/sorpchrom/article/view/2111.