HAKIM, Arief Rahman. Effect of Clay Content in Sulfonated Poly-Ether–Ether Ketone (sPEEK) on Methanol Permeability via Direct Methanol Fuel Cell Membrane. Eksergi, [S. l.], v. 15, n. 1, p. 9–15, 2018. DOI: 10.31315/e.v15i1.2236. Disponível em: https://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2236. Acesso em: 19 jul. 2025.