Abdulhussein, S., and A. Al wared. “Single and Binary Adsorption of Cu(II) and Ni(II) Ions from Aqueous Solutions by Sunflower Seed Husk”. Association of Arab Universities Journal of Engineering Sciences, Vol. 26, no. 1, Mar. 2019, pp. 35-43, doi:10.33261/jaaru.2019.26.1.005.