SORBRATION OF CU(II) IONS ON AN-31 ANION EXCHANGE MATERIAL. Scientific journal of the Fergana State University, [S. l.], v. 31, n. 2, p. 196, 2025. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/6333. Acesso em: 8 jan. 2026.