Aransiola, S., U. Ijah, O. Abioye, and J. Bala. “Microbial-Aided Phytoremediation of Heavy Metals Contaminated Soil: A Review”. European Journal of Biological Research, Vol. 9, no. 2, June 2019, pp. 104-25, http://www.journals.tmkarpinski.com/index.php/ejbr/article/view/157.