Son, Le Thanh, and Le Cao Khai. “Reduction of COD in Nam Son Landfill Leachate by Electro-Fenton As Secondary Treatment After Electrocoagulation Pretreatment”. Vietnam Journal of Science and Technology, vol. 57, no. 6, Nov. 2019, pp. 724-33, doi:10.15625/2525-2518/57/6/13883.