A. W. Zularisam, A. F. Ismail, M. R. Salim, and M. Sakinah, “Foulant Analyses of Ultrafiltration (UF) Membrane Fouled with Natural Organic Matter (NOM) of Ulu Pontian River and Bekok Dam Reservoir”, Malaysian J. Sci., vol. 27, no. 2, pp. 83–90, Aug. 2008.