Hamran, N. H., F. Marpani, N. H. Othman, N. R. Nik Him, N. H. Alias, and J. Jai. “Effect of PH on Membrane Fouling During Alcohol Dehydrogenase Immobilization in PES Membrane”. Malaysian Journal of Chemical Engineering &Amp; Technology, vol. 3, no. 2, Dec. 2020, pp. 30-35, doi:10.24191/mjcet.v3i2.11232.