I. C. Ossai, F. S. H., and G. Redzwan, “The Utilization of Water Hyacinth (Eichhorniacrassipes) as Aquatic Macrophage Treatment System (AMATS) in Phytoremediation for Palm Oil Mill Effluent (POME)”, IJSBAR, vol. 13, no. 2, pp. 31–47, Sep. 2014.