Abdul Hamid, Mohd Kameil, and Mohamad Shahidan Daud. “Tribological Study of Engine Oil Lubricant Characteristics and Its Performance on 660cc Engine”. Journal of Transport System Engineering 2, no. 1 (March 1, 2015): 37–40. Accessed December 20, 2024. https://jtse.utm.my/index.php/jtse/article/view/38.