Horsfall Jnr., M., F. E. Ogban, and E. E. Akporhonor. “Recovery of Lead and Cadmium Ions from Metal-Loaded Biomass of Wild Cocoyam (Caladium Bicolor) Using Acidic, Basic and Neutral Eluent Solutions”. Electronic Journal of Biotechnology, vol. 9, no. 2, Apr. 2006, pp. 0-0, https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/v9n2-9.