“Direct and Derivative Spectrophotometric Determination of Copper (II) using 3, 5-Dimethoxy-4-hydroxy Benzaldehyde Isonicotinoyl Hydrazone (DMHBIH)” (2010) Journal of International Academy of Physical Sciences, 14(1), pp. 123–130. Available at: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/299 (Accessed: 23 October 2026).