Loloii, M. (2003). 'Measurement of Chemical Oxygen Demand (COD) Using Trivalent Manganese as an Oxidizer with Chloride Removal by Sodium Bismuthate.', Journal of Water and Wastewater; Ab va Fazilab ( in persian ), 14(2), pp. 66-68. doi: 10.22093/wwj.2003.176414