Nguyen, Huy Tung, et al. “Research to Synthesize Cationic Polyacrylamide Emulsion Use for Treatment Wastewater Drain from the Paper-Making Process”. JST: Engineering And Technology For Sustainable Development, vol. 33, no. 4, Oct. 2023, pp. 24-31, doi:10.51316/jst.169.etsd.2023.33.4.4.