“Composite Proton Electrolyte Membranes C Poly Ether-Ether Ketone (SPEEK) at Various Amount of Mesoporous Phosphotungstic Acid (mPTA) for Hydrogen Fuel Cell Application”. Journal of Applied Membrane Science & Technology 24, no. 3 (November 19, 2020). Accessed July 23, 2026. https://amst.utm.my/index.php/amst/article/view/185.