SHAHDAN, S. N. .; HIRZIN, R. S. F. N. . Pre-Treatment of Used Cooking Oil Followed by Transesterification Reaction in the Production of Used Cooking Oil-Based Polyol. Scientific Research Journal, [S. l.], v. 18, n. 2, p. 129–146, 2021. DOI: 10.24191/srj.v18i2.13749. Disponível em: https://journal.uitm.edu.my/ojs/index.php/SRJ/article/view/3044. Acesso em: 5 jan. 2025.