S. El-Hassanin, A. ., M. . R. Samak, S. . R. Radwan, and G. . A. El-Chaghaby. “Preparation and Characterization of Biochar from Rice Straw and Its Application in Soil Remediation: DOI: 10.32526/Ennrj.18.3.2020.27”. Environment and Natural Resources Journal, vol. 18, no. 3, May 2020, pp. 283-9, https://ph02.tci-thaijo.org/index.php/ennrj/article/view/240937.