Hussain, S. F., D. S. Khazaal, and Z. H. Hatif. “Biosorption of Lead and Chromium Ions by Using Penicillium Digitatum (Pers.) Sacc. From Industrial Water”. Iraqi Journal of Science, Vol. 61, no. 8, Aug. 2020, pp. 1880-6, doi:10.24996/ijs.2020.61.8.4.