“Biosorption of Pb and Ni From Aqueous Solution by Staphylococcus Aureus, Pantoea and Pseudomonas Aeruginosa”. Iraqi Journal of Science, vol. 60, no. 4, May 2019, pp. 739-44, https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/766.