1. American Public Health Association/American Water Works Association/Water Environment Federation, 1998. Standard Methods for the Examination of Water and Wastewater. 20th ed. Washington DC, USA.
2. Landfill leachates pretreatment by coagulation-flocculation;Amokrane;Water Research,1997
3. Combination of Wet Oxidation and Activated Sludge Treatment;Avezzù,1992
4. Chemical treatment of leachates from sanitary landfills;Ho;Journal Water Pollution Control Federation,1974
5. International Standards Organization (ISO 6060), 1986. Water Quality-Determination of the Chemical Oxygen Demand. Reference No: 6060–1986.