OJEKA, E.; IYUN, J. 5(4-dimethylaminobenzylidene) rhodanine as a reagent for the spectrophotometric determination of copper and manganese. Global Journal of Pure and Applied Sciences, [S. l.], v. 10, n. 4, p. 577–583, 2004. DOI: 10.4314/gjpas.v10i4.16442. Disponível em: https://www.ajol.info/index.php/gjpas/article/view/16442. Acesso em: 29 aug. 2026.