Mohd Yusof, Muhammad Nur Amirulhaq, and Nurul Fitriah Nasir. “[RETRACTED] Effect of Reaction Temperature and Inlet Velocity of a Bubble Column Reactor on the Bubble Size for Biodiesel Production”. Research Progress in Mechanical and Manufacturing Engineering 3, no. 1 (August 14, 2022): 566–575. Accessed March 12, 2026. https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4528.