“Sorption of Ni2+ Ions by Anion Exchangers based on Epichlorohydrin Oligomers and 4-Vinylpyridine” (2014) Global Journal of Science Frontier Research, 14(B5), pp. 7–11. Available at: https://www.journalofscience.org/index.php/GJSFR/article/view/1324 (Accessed: 14 August 2026).