Al-Har, M. A. M. (2017) “Preparation and Determination of Nickel (II), Copper (II) and Cobalt (II) with new organic reagent by spectrophotometric methods”, Al-Qadisiyah Journal of Pure Science, 18(3), pp. 186-196. Available at: https://www.journalsc.qu.edu.iq.51-77-64-103.cpanel.site/index.php/JOPS/article/view/459 (Accessed: 18January2026).