Sailah, I.; Ismayana, A.; Maddu, A.; Puspaningrum, T.; Aryanto, A. Y.; Indrasti, N. S. Performance Improvement of Polysulfone Membrane Fillered by Nanosilica Boiler Ash Sugarcane Industry on Direct Methanol Fuel Cell. IJSBAR 2018, 37, 101-111.