Kamarudin, Siti Kartom, Wan Ramli Wan daud, Ayub Md Som, Jr Abdul Wahab Mohammad, and Mohd Sobri Takriff. 2004. “Optimization of 5-KW Mobile and Portable PEMFC System via Energy Integration”. ASEAN Journal of Chemical Engineering 4 (2), 19-23. https://journal.ugm.ac.id/v3/AJChE/article/view/7595.