Yahaya, Aiman, Syahrullail Samion, Zulhanafi Paiman, Arif Dandan, and Zuraidah Rasep. “Friction and Wear Performance of Lubricants Formulated With Palm Kernel Methyl Ester and Polymeric Additives in Hydrogen-Fuelled Engines”. Journal of Transport System Engineering 12, no. 1 (June 26, 2025): 24–30. Accessed June 27, 2025. https://jtse.utm.my/index.php/jtse/article/view/246.