“SORPTION OF COPPER (II), NICKEL (II) AND COBALT (II) IONS INTO THE IONITE MODIFIED BY POLYPHINYLCHLORIDE AND POLYETHYLENE POLYAMINE”, SJFSU, no. 3, p. 4, Jun. 2023, Accessed: Jan. 02, 2026. [Online]. Available: https://journal.fdu.uz/index.php/sjfsu/article/view/199