OKUTANI, T.; ICHIKAWA, E.; NAGAI, H.; HASHIMOTO, T.; MAKIHATA, T. Crystalline silica in compressed rice hull coke ash. Journal of Metals, Materials and Minerals, Bangkok, Thailand, v. 28, n. 1, 2018. Disponível em: https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/355. Acesso em: 8 jun. 2023.