Ali Taher, Mohammad, Ali Mostafavi, and Tahereh Rohani. 2010. “Atomic Absorption Spectrometric Determination of Trace Amounts of Copper in Natural Waters and Standard Biological Samples After Separation and Preconcentration onto Amberlite XAD-2 Loaded With 2-(5-Bromo-2-Pyridylazo)-5-Diethylaminophenol”. Asian Journal of Chemistry 15 (3):1331-38. https://asianpubs.org/index.php/ajchem/article/view/21809.