U. . PONGSA, P. . LUMSAKUL, O. . JAMESANG, P. . SAENGKHIAO, P. . SANGRAYUB, and W. . PUMCHAN, “Feasibility study of coconut shell biochar production using community-scale biochar kiln ”, J Met Mater Miner, vol. 33, no. 2, pp. 128–138, Jun. 2023.