Direct and Derivative Spectrophotometric Determination of Cobalt(II) Using 3,5-Dimethoxy-4- hydroxybenzaldehydebenzoylhydrazone (DMBBH). Journal of International Academy of Physical Sciences, [S. l.], v. 15, n. 2, p. 249–257, 2011. Disponível em: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/605. Acesso em: 23 oct. 2026.