Sazali, N. ., M. F. . Ghazali, J. . Jaafar, W. N. . Wan Salleh, and M. H. . Dzarfan Othman. “A Short Review on SPEEK-Based Direct Methanol Fuel Cell (DMFC) for Automotive Power Systems”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 64, no. 2, Dec. 2020, pp. 326-3, https://www.akademiabaru.com/submit/index.php/arfmts/article/view/2770.