Hakim, A.R. 2018. Effect of Clay Content in Sulfonated Poly-Ether–Ether Ketone (sPEEK) on Methanol Permeability via Direct Methanol Fuel Cell Membrane. Eksergi. 15, 1 (Jul. 2018), 9–15. DOI:https://doi.org/10.31315/e.v15i1.2236.