A. Mohammed, A. P. D. A., and N. Ali Hameed. “Biosorption of Lead, Copper, and Nickel onto Tea Waste: Equilibrium, and Kinetic Studies”. Association of Arab Universities Journal of Engineering Sciences, Vol. 24, no. 3, Dec. 2017, pp. 150-67, https://jaaru.org/index.php/auisseng/article/view/61.