Al-Amrani, W. A., N. S. S. Mohd Fathi, M. A. K. Megat Hanafiah, and H. Zakaria. “Comparative Biosorption of Cu(II) and Pb(II) Ions from Aqueous Solutions Using Soursop (Annona Muricata L) Leaf Powder: Characterisation, Isotherm and Kinetic Studies”. Bioresources and Environment, vol. 1, no. 1, Feb. 2023, pp. 66-79, doi:10.24191/bioenv.v1i1.21.