AFSHAR, Z.GH., and H. PARHAM. 2010. “Determination of Trace Amounts of Cationic Surfactant Cetyl Trimethyl Ammonium Bromide by Liquid-Liquid Extraction-Spectrophotometry Method”. Asian Journal of Chemistry 22 (4):3009-13. https://asianpubs.org/index.php/ajchem/article/view/11549.