Ngoc Lan Pham, Van Boi Luu, Thi Tuyet Mai Phan, and Thi Son Nguyen. “Synthesis and Characterization of Alkyl-Methacrylate-Maleic Anhydride Copolymer for Use As a Biodiesel Flow Improver”. Vietnam Journal of Science, Technology and Engineering, vol. 63, no. 3, Sept. 2021, pp. 24-29, doi:10.31276/VJSTE.63(3).24-29.