N. M. Ismail, N. R. Jakariah, N. Bolong, S. M. Anissuzaman, N. A. H. M. Nordin, and A. R. Razali, “Effect of Polymer Concentration on the Morphology and Mechanical Properties of Asymmetric Polysulfone (PSf) Membrane”, AMST, vol. 21, no. 1, Dec. 2017.