NAING, Z. Y.; NISTRATOV, A.; KLUSHIN, V. The Chemical activation as a prospect for the transformation of fossil coal from the Kalewa deposit into active coals. International Journal of Biology and Chemistry, [S. l.], v. 14, n. 1, p. 172–176, 2021. DOI: 10.26577/ijbch.2021.v14.i1.019. Disponível em: https://ijbch.kaznu.kz/index.php/kaznu/article/view/535. Acesso em: 8 may. 2024.