Abid, Mohammad Fadhil, Mohammad Ibrahim, and Ahlam Saaid. “Improvement of Antiknocking Characteristics of Iraqi Gasoline”. Journal of Petroleum Research and Studies 4, no. 1 (June 1, 2013): 10-26. Accessed May 5, 2024. https://jprs.gov.iq/index.php/jprs/article/view/80.