et al., Nabhan A. “Influence of TiO2 and SiO2 Nanoparticles Additives on the Engine Oil Tribological Properties: Experimental Study at Different Operating Conditions”. International Journal of Advanced Science and Technology 29, no. 1 (January 13, 2020): 845 - 855. Accessed April 24, 2024. http://sersc.org/journals/index.php/IJAST/article/view/3553.