Hashim, Hayder A. M., and Dr. Haroun A. K. shahad Aljanabi. “Photo-Degradation Effect on Naphtha Octane Number by Using UV Radiation”. Journal of Petroleum Research and Studies 8, no. 2 (July 1, 2018): 15-48. Accessed May 1, 2024. https://jprs.gov.iq/index.php/jprs/article/view/231.