M. N. A. Mohd Yusof and N. F. . Nasir, “[RETRACTED] Effect of reaction temperature and inlet velocity of a bubble column reactor on the bubble size for biodiesel production”, rpmme, vol. 3, no. 1, pp. 566–575, Aug. 2022, Accessed: Mar. 12, 2026. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4528