SORPTION OF COBALT (II) AND CHROMIUM (III) IONS NITROGEN - AND SULFUR-CONTAINING COMPLEXONS BASED ON POLYVINYLCHLORIDE. Scientific journal of the Fergana State University, [S. l.], n. 3, p. 19–26, 2023. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/570. Acesso em: 10 jan. 2026.