Chu, T. H. N., Hoang, H. H. and Nguyen, T. T. H. (2021) “Factors affecting the flocculation process waste emulsion cutting oil reduce COD content”, JST: Engineering And Technology For Sustainable Development, 31(1), pp. 78–82. doi: 10.51316/jst.148.etsd.2021.31.1.16.