Ratnasari, I. F. D., S. N. Hadi, S. R. Suparto, O. Herliana, and Y. R. Ahadiyat. “Phytoremediation of Cadmium-Contaminated Soil Using Terrestrial Kale (Ipomoea Reptans Poir) and Corncob Biochar”. Journal of Degraded and Mining Lands Management, vol. 7, no. 4, July 2020, pp. 2313-8, doi:10.15243/jdmlm.2020.074.2313.