Dadzie, D., A. K. Quainoo, and S. Obiri. “The Use of Maize Tassel As an Agricultural by-Product to Ameliorate Heavy Metals in Contaminated Groundwater”. Research in Biotechnology, vol. 2, no. 4, Sept. 2011, https://updatepublishing.com/journal/index.php/rib/article/view/2368.