L. A. Abdulridha, T. M. Hameed, M. M. Khudhair, and S. K. Ghadeer, “Impact of Nano-Gel of titanium dioxide Additive on Base Oil Properties Produced in Iraqi Refineries”, Iraqi Journal of Science, pp. 75–83, Apr. 2019, Accessed: Dec. 22, 2025. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/687