Ahmed Dhahir, Saadiyah, and Sana Rhajab Bakir. “Cloud Point Extraction Spectrophotometric Determination of Copper, Chromium and Cobalt by Salen As Reagent in Wastewater of Iraq”. Asian Journal of Chemistry 26, no. 16 (August 4, 2014): 5305–5310. Accessed July 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_17_80.