UKOHA, P. O.; EKERE, N. R.; OPARA, I. J. STUDIES ON EXTRACTION OF Co (II) IONS FROM AQUEOUS SOLUTION USING 1,5-DIMETHYL- 2- PHENYL-4-[(E)-(2,3,4-TRIHYDROXYLPHENYL)DIAZENYL]-1,2-DIHYDRO-3H-PYRAZOL-3-ONE. Journal of Chemical Society of Nigeria, [S. l.], v. 40, n. 1, 2017. Disponível em: http://www.journals.chemsociety.org.ng/index.php/jcsn/article/view/4. Acesso em: 14 nov. 2025.