Ali, Salah M., Dr. Hareth Sh. Moshref, Saad K. ibrahim, Harith A. Mohammed, Dr. Zaidoon M. Shakor, and Dr. Shaker Mohmud. “Studies and Modeling for Upgrading Units for Heavy Oil Refineries”. Journal of Petroleum Research and Studies 8, no. 2 (July 1, 2018): 240-255. Accessed November 24, 2024. https://jprs.gov.iq/index.php/jprs/article/view/247.